Sinch Community

Hello, thank you for reaching out!   Based on your previous post, it looks like you are trying to use the MMS functionality of the SMS API. At this time, only mobile terminated MMS messages are supported on the SMS API (that is, only sending MMS messages is supported by the SMS API at this time). Support for mobile originated MMS messages is currently under development. Please also note that:   MMS support is currently only available in the US region You must contact support in order to enable this functionality If you are experiencing issues with receiving MMS messages using another API (for example, the MMS channel of the Conversation API or Sinch's standalone MMS APIs), or if you have any other questions to ask or context to provide, please feel free to add another reply to this post.   Thank you! ... View more

Hello, thank you for reaching out!   It looks like you are trying to use the SMS API to send MMS messages. In order to send MMS messages using the SMS API, the corresponding functionality must be enabled for your account. Please contact Sinch support, who will be able to enable this feature on your account. If you have already done so, or if you run into other issues after the feature is enabled, please feel free to add another reply to this post. Also, note that:   Only mobile terminated MMS messages are supported at this time MMS support is currently only available in the US region   Thank you! ... View more