Right now you can only send text messages up to 160 characters in length. This is a limit imposed by mobile carriers (e.g. T-Mobile, AT&T, Verizon, etc.) for the length of individual messages.
It's possible for messages up to 1,600 characters in length to be split up behind-the-scenes, and automatically reassembled into one message by the receiving phone (so that it still looks like one long message).
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My apologies if this has already been requested.
You offer SMS and I appreciate that but sometimes I need to get wordy. Statistics tell us that text msg get read more often and sooner than email. Would it be possible to offer MMS and SMS or just MMS?