# Smart Encoding

SMS messages can be encoded in two ways:

* GSM-7: Supports 160 characters in the first segment/message (or 153 in concatenated messages);
* UCS-2 (Unicode): Required for special characters, but only supports 70 characters in the first segment/message (or 67 in concatenated messages);

When your message contains certain Unicode characters (such as "smart quotes" from word processors), the entire message must be sent as UCS-2, which significantly reduces the character limit. Smart Encoding attempts to replace these characters with GSM-7 compatible alternatives.

### How to Enable

Add `meta.sms.smartEncoding`: `true` to your SMS message options:

```json
POST /workspaces/{workspaceId}/channels/{channelId}/messages
{
  "receiver": {
    "contacts": [{ "identifierValue": "+1234567890" }]
  },
  "body": {
    "type": "text",
    "text": { "text": "“Hello”! Can’t wait for our meeting!" }
  },
  "meta": {
    "sms": {
      "smartEncoding": true
    }
  }
}
```

*In* [*Navigators*](/api/channels-api/api-reference/navigators.md)*, this feature works exactly the same.*

### How It Works

When smartEncoding is enabled:

1. Transliteration: The system replaces known Unicode characters with GSM-7 equivalents (e.g., `“` → `"` , `…` → `...`)
2. Compatibility Check: After transliteration, the system checks if the result is fully GSM-7 compatible
3. Outcome:
   1. Success: If all characters are now GSM-7-compatible, the transliterated text is used for segment calculation and transmission. The response is `"success"` in `meta.extraInformation.smartEncoded`.
   2. Failed: If non-GSM characters remain (e.g., emoji, CJK characters), the original message is sent as Unicode. The response is `"failed"` in `meta.extraInformation.smartEncoded`.

#### Example

Input message:\
`“Hello” — welcome to our service…` 

After transliteration:\
`"Hello" - welcome to our service...`

This message now fits in GSM-7 encoding (160 char limit) instead of requiring Unicode (70 char limit).

#### Response

When smart encoding is enabled, the message response includes a `smartEncoded` flag in `meta.extraInformation`:

**Message Object:**

```json
{
  "id": "msg-123",
  [...]
  "meta": {
    "extraInformation": {
      "smartEncoded": "success"
    },
    "sms": {
      "smartEncoding": true
    }
  }
}
```

`meta.extraInformation.smartEncoded`  value:

* `success`: Transliteration succeeded; message sent as GSM-7;
* `failed`: Transliteration attempted, but message still contains Unicode; sent as Unicode/UCS-2;

### Character Mapping Reference

<table><thead><tr><th width="120.1328125">Character</th><th width="170.2421875">Unicode</th><th width="120.2890625">Replacement</th><th>Description</th></tr></thead><tbody><tr><td><code>«</code></td><td>U+00AB</td><td><code>"</code></td><td>Left-pointing double angle quotation mark</td></tr><tr><td><code>»</code></td><td>U+00BB</td><td><code>"</code></td><td>Right-pointing double angle quotation mark</td></tr><tr><td><code>"</code></td><td>U+201C</td><td><code>"</code></td><td>Left double quotation mark</td></tr><tr><td><code>"</code></td><td>U+201D</td><td><code>"</code></td><td>Right double quotation mark</td></tr><tr><td><code>ʺ</code></td><td>U+02BA</td><td><code>"</code></td><td>Modifier letter double prime</td></tr><tr><td><code>ˮ</code></td><td>U+02EE</td><td><code>"</code></td><td>Modifier letter double apostrophe</td></tr><tr><td><code>‟</code></td><td>U+201F</td><td><code>"</code></td><td>Double high-reversed-9 quotation mark</td></tr><tr><td><code>❝</code></td><td>U+275D</td><td><code>"</code></td><td>Heavy double turned comma quotation mark ornament</td></tr><tr><td><code>❞</code></td><td>U+275E</td><td><code>"</code></td><td>Heavy double comma quotation mark ornament</td></tr><tr><td><code>〝</code></td><td>U+301D</td><td><code>"</code></td><td>Reversed double prime quotation mark</td></tr><tr><td><code>〞</code></td><td>U+301E</td><td><code>"</code></td><td>Double prime quotation mark</td></tr><tr><td><code>＂</code></td><td>U+FF02</td><td><code>"</code></td><td>Fullwidth quotation mark</td></tr><tr><td><code>„</code></td><td>U+201E</td><td><code>"</code></td><td>Double low-9 quotation mark</td></tr><tr><td><code>'</code></td><td>U+2018</td><td><code>'</code></td><td>Left single quotation mark</td></tr><tr><td><code>'</code></td><td>U+2019</td><td><code>'</code></td><td>Right single quotation mark</td></tr><tr><td><code>ʻ</code></td><td>U+02BB</td><td><code>'</code></td><td>Modifier letter turned comma</td></tr><tr><td><code>ˈ</code></td><td>U+02C8</td><td><code>'</code></td><td>Modifier letter vertical line</td></tr><tr><td><code>ʼ</code></td><td>U+02BC</td><td><code>'</code></td><td>Modifier letter apostrophe</td></tr><tr><td><code>ʽ</code></td><td>U+02BD</td><td><code>'</code></td><td>Modifier letter reversed comma</td></tr><tr><td><code>ʹ</code></td><td>U+02B9</td><td><code>'</code></td><td>Modifier letter prime</td></tr><tr><td><code>‛</code></td><td>U+201B</td><td><code>'</code></td><td>Single high-reversed-9 quotation mark</td></tr><tr><td><code>＇</code></td><td>U+FF07</td><td><code>'</code></td><td>Fullwidth apostrophe</td></tr><tr><td><code>´</code></td><td>U+00B4</td><td><code>'</code></td><td>Acute accent</td></tr><tr><td><code>ˊ</code></td><td>U+02CA</td><td><code>'</code></td><td>Modifier letter acute accent</td></tr><tr><td><code>`</code></td><td>U+0060</td><td><code>'</code></td><td>Grave accent</td></tr><tr><td><code>ˋ</code></td><td>U+02CB</td><td><code>'</code></td><td>Modifier letter grave accent</td></tr><tr><td><code>❛</code></td><td>U+275B</td><td><code>'</code></td><td>Heavy single turned comma quotation mark ornament</td></tr><tr><td><code>❜</code></td><td>U+275C</td><td><code>'</code></td><td>Heavy single comma quotation mark ornament</td></tr><tr><td><code>̓</code></td><td>U+0313</td><td><code>'</code></td><td>Combining comma above</td></tr><tr><td><code>̔</code></td><td>U+0314</td><td><code>'</code></td><td>Combining reversed comma above</td></tr><tr><td><code>︐</code></td><td>U+FE10</td><td><code>'</code></td><td>Presentation form for vertical comma</td></tr><tr><td><code>︑</code></td><td>U+FE11</td><td><code>'</code></td><td>Presentation form for vertical ideographic comma</td></tr><tr><td><code>÷</code></td><td>U+00F7</td><td><code>/</code></td><td>Division sign</td></tr><tr><td><code>¼</code></td><td>U+00BC</td><td><code>1/4</code></td><td>Vulgar fraction one quarter</td></tr><tr><td><code>½</code></td><td>U+00BD</td><td><code>1/2</code></td><td>Vulgar fraction one half</td></tr><tr><td><code>¾</code></td><td>U+00BE</td><td><code>3/4</code></td><td>Vulgar fraction three quarters</td></tr><tr><td><code>⧸</code></td><td>U+29F8</td><td><code>/</code></td><td>Big solidus</td></tr><tr><td><code>̷</code></td><td>U+0337</td><td><code>/</code></td><td>Combining short solidus overlay</td></tr><tr><td><code≯</code></td><td>U+0338</td><td><code>/</code></td><td>Combining long solidus overlay</td></tr><tr><td><code>⁄</code></td><td>U+2044</td><td><code>/</code></td><td>Fraction slash</td></tr><tr><td><code>∕</code></td><td>U+2215</td><td><code>/</code></td><td>Division slash</td></tr><tr><td><code>／</code></td><td>U+FF0F</td><td><code>/</code></td><td>Fullwidth solidus</td></tr><tr><td><code>⧹</code></td><td>U+29F9</td><td><code>\</code></td><td>Big reverse solidus</td></tr><tr><td><code>⧵</code></td><td>U+29F5</td><td><code>\</code></td><td>Reverse solidus operator</td></tr><tr><td><code>⃥</code></td><td>U+20E5</td><td><code>\</code></td><td>Combining reverse solidus overlay</td></tr><tr><td><code>﹨</code></td><td>U+FE68</td><td><code>\</code></td><td>Small reverse solidus</td></tr><tr><td><code>＼</code></td><td>U+FF3C</td><td><code>\</code></td><td>Fullwidth reverse solidus</td></tr><tr><td><code>̲</code></td><td>U+0332</td><td><code>_</code></td><td>Combining low line</td></tr><tr><td><code>＿</code></td><td>U+FF3F</td><td><code>_</code></td><td>Fullwidth low line</td></tr><tr><td><code>‗</code></td><td>U+2017</td><td><code>_</code></td><td>Double low line</td></tr><tr><td><code>⃒</code></td><td>U+20D2</td><td><code>|</code></td><td>Combining long vertical line overlay</td></tr><tr><td><code>⃓</code></td><td>U+20D3</td><td><code>|</code></td><td>Combining short vertical line overlay</td></tr><tr><td><code>∣</code></td><td>U+2223</td><td><code>|</code></td><td>Divides</td></tr><tr><td><code>｜</code></td><td>U+FF5C</td><td><code>|</code></td><td>Fullwidth vertical line</td></tr><tr><td><code>⎸</code></td><td>U+23B8</td><td><code>|</code></td><td>Left vertical box line</td></tr><tr><td><code>⎹</code></td><td>U+23B9</td><td><code>|</code></td><td>Right vertical box line</td></tr><tr><td><code>⏐</code></td><td>U+23D0</td><td><code>|</code></td><td>Vertical line extension</td></tr><tr><td><code>⎜</code></td><td>U+239C</td><td><code>|</code></td><td>Left parenthesis extension</td></tr><tr><td><code>⎟</code></td><td>U+239F</td><td><code>|</code></td><td>Right parenthesis extension</td></tr><tr><td><code>⎼</code></td><td>U+23BC</td><td><code>-</code></td><td>Horizontal scan line-7</td></tr><tr><td><code>⎽</code></td><td>U+23BD</td><td><code>-</code></td><td>Horizontal scan line-9</td></tr><tr><td><code>―</code></td><td>U+2015</td><td><code>-</code></td><td>Horizontal bar</td></tr><tr><td><code>﹣</code></td><td>U+FE63</td><td><code>-</code></td><td>Small hyphen-minus</td></tr><tr><td><code>－</code></td><td>U+FF0D</td><td><code>-</code></td><td>Fullwidth hyphen-minus</td></tr><tr><td><code>‐</code></td><td>U+2010</td><td><code>-</code></td><td>Hyphen</td></tr><tr><td><code>•</code></td><td>U+2022</td><td><code>-</code></td><td>Bullet</td></tr><tr><td><code>⁃</code></td><td>U+2043</td><td><code>-</code></td><td>Hyphen bullet</td></tr><tr><td><code>—</code></td><td>U+2014</td><td><code>-</code></td><td>Em dash</td></tr><tr><td><code>–</code></td><td>U+2013</td><td><code>-</code></td><td>En dash</td></tr><tr><td><code>﹫</code></td><td>U+FE6B</td><td><code>@</code></td><td>Small commercial at</td></tr><tr><td><code>＠</code></td><td>U+FF20</td><td><code>@</code></td><td>Fullwidth commercial at</td></tr><tr><td><code>﹩</code></td><td>U+FE69</td><td><code>$</code></td><td>Small dollar sign</td></tr><tr><td><code>＄</code></td><td>U+FF04</td><td><code>$</code></td><td>Fullwidth dollar sign</td></tr><tr><td><code>ǃ</code></td><td>U+01C3</td><td><code>!</code></td><td>Latin letter retroflex click</td></tr><tr><td><code>︕</code></td><td>U+FE15</td><td><code>!</code></td><td>Presentation form for vertical exclamation mark</td></tr><tr><td><code>﹗</code></td><td>U+FE57</td><td><code>!</code></td><td>Small exclamation mark</td></tr><tr><td><code>！</code></td><td>U+FF01</td><td><code>!</code></td><td>Fullwidth exclamation mark</td></tr><tr><td><code>﹟</code></td><td>U+FE5F</td><td><code>#</code></td><td>Small number sign</td></tr><tr><td><code>＃</code></td><td>U+FF03</td><td><code>#</code></td><td>Fullwidth number sign</td></tr><tr><td><code>﹪</code></td><td>U+FE6A</td><td><code>%</code></td><td>Small percent sign</td></tr><tr><td><code>％</code></td><td>U+FF05</td><td><code>%</code></td><td>Fullwidth percent sign</td></tr><tr><td><code>﹠</code></td><td>U+FE60</td><td><code>&#x26;</code></td><td>Small ampersand</td></tr><tr><td><code>＆</code></td><td>U+FF06</td><td><code>&#x26;</code></td><td>Fullwidth ampersand</td></tr><tr><td><code>‚</code></td><td>U+201A</td><td><code>,</code></td><td>Single low-9 quotation mark</td></tr><tr><td><code>̦</code></td><td>U+0326</td><td><code>,</code></td><td>Combining comma below</td></tr><tr><td><code>﹐</code></td><td>U+FE50</td><td><code>,</code></td><td>Small comma</td></tr><tr><td><code>、</code></td><td>U+3001</td><td><code>,</code></td><td>Ideographic comma</td></tr><tr><td><code>﹑</code></td><td>U+FE51</td><td><code>,</code></td><td>Small ideographic comma</td></tr><tr><td><code>，</code></td><td>U+FF0C</td><td><code>,</code></td><td>Fullwidth comma</td></tr><tr><td><code>､</code></td><td>U+FF64</td><td><code>,</code></td><td>Halfwidth ideographic comma</td></tr><tr><td><code>❨</code></td><td>U+2768</td><td><code>(</code></td><td>Medium left parenthesis ornament</td></tr><tr><td><code>❪</code></td><td>U+276A</td><td><code>(</code></td><td>Medium flattened left parenthesis ornament</td></tr><tr><td><code>﹙</code></td><td>U+FE59</td><td><code>(</code></td><td>Small left parenthesis</td></tr><tr><td><code>（</code></td><td>U+FF08</td><td><code>(</code></td><td>Fullwidth left parenthesis</td></tr><tr><td><code>⟮</code></td><td>U+27EE</td><td><code>(</code></td><td>Mathematical left flattened parenthesis</td></tr><tr><td><code>⦅</code></td><td>U+2985</td><td><code>(</code></td><td>Left white parenthesis</td></tr><tr><td><code>❩</code></td><td>U+2769</td><td><code>)</code></td><td>Medium right parenthesis ornament</td></tr><tr><td><code>❫</code></td><td>U+276B</td><td><code>)</code></td><td>Medium flattened right parenthesis ornament</td></tr><tr><td><code>﹚</code></td><td>U+FE5A</td><td><code>)</code></td><td>Small right parenthesis</td></tr><tr><td><code>）</code></td><td>U+FF09</td><td><code>)</code></td><td>Fullwidth right parenthesis</td></tr><tr><td><code>⟯</code></td><td>U+27EF</td><td><code>)</code></td><td>Mathematical right flattened parenthesis</td></tr><tr><td><code>⦆</code></td><td>U+2986</td><td><code>)</code></td><td>Right white parenthesis</td></tr><tr><td><code>⁎</code></td><td>U+204E</td><td><code>*</code></td><td>Low asterisk</td></tr><tr><td><code>∗</code></td><td>U+2217</td><td><code>*</code></td><td>Asterisk operator</td></tr><tr><td><code>⊛</code></td><td>U+229B</td><td><code>*</code></td><td>Circled asterisk operator</td></tr><tr><td><code>✢</code></td><td>U+2722</td><td><code>*</code></td><td>Four teardrop-spoked asterisk</td></tr><tr><td><code>✣</code></td><td>U+2723</td><td><code>*</code></td><td>Four balloon-spoked asterisk</td></tr><tr><td><code>✤</code></td><td>U+2724</td><td><code>*</code></td><td>Heavy four balloon-spoked asterisk</td></tr><tr><td><code>✥</code></td><td>U+2725</td><td><code>*</code></td><td>Four club-spoked asterisk</td></tr><tr><td><code>✱</code></td><td>U+2731</td><td><code>*</code></td><td>Heavy asterisk</td></tr><tr><td><code>✲</code></td><td>U+2732</td><td><code>*</code></td><td>Open centre asterisk</td></tr><tr><td><code>✳</code></td><td>U+2733</td><td><code>*</code></td><td>Eight spoked asterisk</td></tr><tr><td><code>✺</code></td><td>U+273A</td><td><code>*</code></td><td>Sixteen pointed asterisk</td></tr><tr><td><code>✻</code></td><td>U+273B</td><td><code>*</code></td><td>Teardrop-spoked asterisk</td></tr><tr><td><code>✼</code></td><td>U+273C</td><td><code>*</code></td><td>Open centre teardrop-spoked asterisk</td></tr><tr><td><code>✽</code></td><td>U+273D</td><td><code>*</code></td><td>Heavy teardrop-spoked asterisk</td></tr><tr><td><code>❃</code></td><td>U+2743</td><td><code>*</code></td><td>Heavy teardrop-spoked pinwheel asterisk</td></tr><tr><td><code>❉</code></td><td>U+2749</td><td><code>*</code></td><td>Balloon-spoked asterisk</td></tr><tr><td><code>❊</code></td><td>U+274A</td><td><code>*</code></td><td>Eight teardrop-spoked propeller asterisk</td></tr><tr><td><code>❋</code></td><td>U+274B</td><td><code>*</code></td><td>Heavy eight teardrop-spoked propeller asterisk</td></tr><tr><td><code>⧆</code></td><td>U+29C6</td><td><code>*</code></td><td>Squared asterisk</td></tr><tr><td><code>﹡</code></td><td>U+FE61</td><td><code>*</code></td><td>Small asterisk</td></tr><tr><td><code>＊</code></td><td>U+FF0A</td><td><code>*</code></td><td>Fullwidth asterisk</td></tr><tr><td><code>˖</code></td><td>U+02D6</td><td><code>+</code></td><td>Modifier letter plus sign</td></tr><tr><td><code>﹢</code></td><td>U+FE62</td><td><code>+</code></td><td>Small plus sign</td></tr><tr><td><code>＋</code></td><td>U+FF0B</td><td><code>+</code></td><td>Fullwidth plus sign</td></tr><tr><td><code>。</code></td><td>U+3002</td><td><code>.</code></td><td>Ideographic full stop</td></tr><tr><td><code>﹒</code></td><td>U+FE52</td><td><code>.</code></td><td>Small full stop</td></tr><tr><td><code>．</code></td><td>U+FF0E</td><td><code>.</code></td><td>Fullwidth full stop</td></tr><tr><td><code>｡</code></td><td>U+FF61</td><td><code>.</code></td><td>Halfwidth ideographic full stop</td></tr><tr><td><code>０</code>-<code>９</code></td><td>U+FF10-U+FF19</td><td><code>0</code>-<code>9</code></td><td>Fullwidth digits</td></tr><tr><td><code>ː</code></td><td>U+02D0</td><td><code>:</code></td><td>Modifier letter triangular colon</td></tr><tr><td><code>˸</code></td><td>U+02F8</td><td><code>:</code></td><td>Modifier letter raised colon</td></tr><tr><td><code>⦂</code></td><td>U+2982</td><td><code>:</code></td><td>Z notation type colon</td></tr><tr><td><code>꞉</code></td><td>U+A789</td><td><code>:</code></td><td>Modifier letter colon</td></tr><tr><td><code>︓</code></td><td>U+FE13</td><td><code>:</code></td><td>Presentation form for vertical colon</td></tr><tr><td><code>：</code></td><td>U+FF1A</td><td><code>:</code></td><td>Fullwidth colon</td></tr><tr><td><code>⁏</code></td><td>U+204F</td><td><code>;</code></td><td>Reversed semicolon</td></tr><tr><td><code>︔</code></td><td>U+FE14</td><td><code>;</code></td><td>Presentation form for vertical semicolon</td></tr><tr><td><code>﹔</code></td><td>U+FE54</td><td><code>;</code></td><td>Small semicolon</td></tr><tr><td><code>；</code></td><td>U+FF1B</td><td><code>;</code></td><td>Fullwidth semicolon</td></tr><tr><td><code>﹤</code></td><td>U+FE64</td><td><code>&#x3C;</code></td><td>Small less-than sign</td></tr><tr><td><code>＜</code></td><td>U+FF1C</td><td><code>&#x3C;</code></td><td>Fullwidth less-than sign</td></tr><tr><td><code>‹</code></td><td>U+2039</td><td><code>&#x3C;</code></td><td>Single left-pointing angle quotation mark</td></tr><tr><td><code>͇</code></td><td>U+0347</td><td><code>=</code></td><td>Combining equals sign below</td></tr><tr><td><code>꞊</code></td><td>U+A78A</td><td><code>=</code></td><td>Modifier letter short equals sign</td></tr><tr><td><code>﹦</code></td><td>U+FE66</td><td><code>=</code></td><td>Small equals sign</td></tr><tr><td><code>＝</code></td><td>U+FF1D</td><td><code>=</code></td><td>Fullwidth equals sign</td></tr><tr><td><code>﹥</code></td><td>U+FE65</td><td><code>></code></td><td>Small greater-than sign</td></tr><tr><td><code>＞</code></td><td>U+FF1E</td><td><code>></code></td><td>Fullwidth greater-than sign</td></tr><tr><td><code>›</code></td><td>U+203A</td><td><code>></code></td><td>Single right-pointing angle quotation mark</td></tr><tr><td><code>︖</code></td><td>U+FE16</td><td><code>?</code></td><td>Presentation form for vertical question mark</td></tr><tr><td><code>﹖</code></td><td>U+FE56</td><td><code>?</code></td><td>Small question mark</td></tr><tr><td><code>？</code></td><td>U+FF1F</td><td><code>?</code></td><td>Fullwidth question mark</td></tr><tr><td><code>Ａ</code>-<code>Ｚ</code></td><td>U+FF21-+FF3A</td><td><code>A</code>-<code>Z</code></td><td>Fullwidth Latin capital letters</td></tr><tr><td><code>ᴀ</code>-<code>ᴢ</code></td><td>U+1D00-U+1D22</td><td><code>A</code>-<code>Z</code></td><td>Latin letters small capital</td></tr><tr><td><code>ˆ</code></td><td>U+02C6</td><td><code>^</code></td><td>Modifier letter circumflex accent</td></tr><tr><td><code>̂</code></td><td>U+0302</td><td><code>^</code></td><td>Combining circumflex accent</td></tr><tr><td><code>＾</code></td><td>U+FF3E</td><td><code>^</code></td><td>Fullwidth circumflex accent</td></tr><tr><td><code>᷍</code></td><td>U+1DCD</td><td><code>^</code></td><td>Combining double circumflex above</td></tr><tr><td><code>❴</code></td><td>U+2774</td><td><code>{</code></td><td>Medium left curly bracket ornament</td></tr><tr><td><code>﹛</code></td><td>U+FE5B</td><td><code>{</code></td><td>Small left curly bracket</td></tr><tr><td><code>｛</code></td><td>U+FF5B</td><td><code>{</code></td><td>Fullwidth left curly bracket</td></tr><tr><td><code>❵</code></td><td>U+2775</td><td><code>}</code></td><td>Medium right curly bracket ornament</td></tr><tr><td><code>﹜</code></td><td>U+FE5C</td><td><code>}</code></td><td>Small right curly bracket</td></tr><tr><td><code>｝</code></td><td>U+FF5D</td><td><code>}</code></td><td>Fullwidth right curly bracket</td></tr><tr><td><code>［</code></td><td>U+FF3B</td><td><code>[</code></td><td>Fullwidth left square bracket</td></tr><tr><td><code>］</code></td><td>U+FF3D</td><td><code>]</code></td><td>Fullwidth right square bracket</td></tr><tr><td><code>˜</code></td><td>U+02DC</td><td><code>~</code></td><td>Small tilde</td></tr><tr><td><code>˷</code></td><td>U+02F7</td><td><code>~</code></td><td>Modifier letter low tilde</td></tr><tr><td><code>̃</code></td><td>U+0303</td><td><code>~</code></td><td>Combining tilde</td></tr><tr><td><code>̰</code></td><td>U+0330</td><td><code>~</code></td><td>Combining tilde below</td></tr><tr><td><code>̴</code></td><td>U+0334</td><td><code>~</code></td><td>Combining tilde overlay</td></tr><tr><td><code>∼</code></td><td>U+223C</td><td><code>~</code></td><td>Tilde operator</td></tr><tr><td><code>～</code></td><td>U+FF5E</td><td><code>~</code></td><td>Fullwidth tilde</td></tr><tr><td><code>‼</code></td><td>U+203C</td><td><code>!!</code></td><td>Double exclamation mark</td></tr><tr><td><code>…</code></td><td>U+2026</td><td><code>...</code></td><td>Horizontal ellipsis</td></tr><tr><td></td><td>U+00A0</td><td></td><td>No-break space</td></tr><tr><td></td><td>U+2000</td><td></td><td>En quad</td></tr><tr><td></td><td>U+2001</td><td></td><td>Em quad</td></tr><tr><td></td><td>U+2002</td><td></td><td>En space</td></tr><tr><td></td><td>U+2003</td><td></td><td>Em space</td></tr><tr><td></td><td>U+2004</td><td></td><td>Three-per-em space</td></tr><tr><td></td><td>U+2005</td><td></td><td>Four-per-em space</td></tr><tr><td></td><td>U+2006</td><td></td><td>Six-per-em space</td></tr><tr><td></td><td>U+2007</td><td></td><td>Figure space</td></tr><tr><td></td><td>U+2008</td><td></td><td>Punctuation space</td></tr><tr><td></td><td>U+2009</td><td></td><td>Thin space</td></tr><tr><td></td><td>U+200A</td><td></td><td>Hair space</td></tr><tr><td></td><td>U+202F</td><td></td><td>Narrow no-break space</td></tr><tr><td></td><td>U+205F</td><td></td><td>Medium mathematical space</td></tr><tr><td></td><td>U+3000</td><td></td><td>Ideographic space</td></tr><tr><td></td><td>U+200B</td><td><em>(removed)</em></td><td>Zero width space</td></tr><tr><td></td><td>U+FEFF</td><td><em>(removed)</em></td><td>Zero width no-break space (BOM)</td></tr><tr><td></td><td>U+2060</td><td><em>(removed)</em></td><td>Word joiner</td></tr><tr><td></td><td>U+2028</td><td><em>(removed)</em></td><td>Line separator</td></tr><tr><td></td><td>U+2029</td><td><em>(removed)</em></td><td>Paragraph separator</td></tr></tbody></table>

### Limitations

Smart encoding cannot help with:

* Emoji: 😀, ❤️, etc. require Unicode;
* CJK characters: Chinese, Japanese, and Korean scripts;
* Arabic, Hebrew, Thai: Scripts not in GSM-7;
* Accented characters not in GSM-7: Characters like `ő`, `ű` (only basic accents like `é`, `ü` are in GSM-7);


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.bird.com/api/channels-api/supported-channels/programmable-sms/sending-sms-messages/smart-encoding.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.