MMS sizes and limitations
Bird enables you to send and receive MMS messages, including multimedia content, to and from a selected group of countries. Currently, you can only send MMS within the US and Canada.
Messages parts and message sizes
MMS is never segmented or broken up into parts, and they do not have catheter limits as SMS. However, MMS and their media files are subjected to size limitations that vary according to the receiving country and networks.
The information below is intended to ensure deliverability across all supported networks in both the USA and Canada. You may be able, on specific networks, to terminate bigger messages but that is not guaranteed
Limitations
An MMS message can carry up to 10 media attachments
MMS media URL should be publicly accessible and respond within 5 seconds
The total maximum file size of an MMS, including all its media attachments, is 900 KB
The maximum file size (after re-sizing, see below) for any given attachment is 600 KB
Only certain file types are accepted (see a full list below)
Resizing
Bird CMR supports resizing images and gifs, if you submit a file that is too big (up to 5 MB), we will try to reduce its size to ensure it can be delivered
Re-sizing is a best-effort attempt at striking a balance between quality and size.
Sometimes, it may fail to reduce the size of media to a level that all carriers can accept, and sometimes, it may impact the file quality.
We suggest that you only submit supported files to maintain control of your attachment quality and size.
Supported media types
Media | Type |
Audio | audio/basic audio/L24 audio/mp4 audio/mpeg audio/ogg audio/vorbis audio/vnd.rn-realaudio audio/vnd.wave audio/3gpp audio/3gpp2 audio/ac3 audio/vnd.wave audio/webm audio/amr-nb audio/amr |
Video | video/mpeg video/mp4 video/quicktime video/webm video/3gpp video/3gpp2 video/3gpp-tt video/H261 video/H263 video/H263-1998 video/H263-2000 video/H264 |
Image | image/jpeg image/gif image/png image/bmp |
Text | text/vcard text/csv text/rtf text/richtext text/calendar |
Troubleshooting
Failure related to an attachment can be reconciled by specific error or failure codes, which you can identify in your logs.
Fallback
You can control your channel MMS support fallback via the settings. If enabled, fallback will convert MMS to normal messages including a URL to the original content. Fallback SMS are charged as Short messages and not as Media.
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