I've Googled and searched the market and can't believe there's no such app. Maybe some other SMS management app has this simple function, to unsplit messages longer than the 160-character limit that were broken into more than one part? Handcent and GO SMS Pro don't mention it.

For some reason (see the answers posted before Feb 17, 2013) people don't quite seem to "get" the problem. Here's a screenshot:

enter image description here

For whatever reason (incompatibilities between carriers in following the Concatenated SMS protocol etc.), I receive messages split in parts of <160 characters. What I'm looking for is a very simple app that would let me select two messages and join them into one, specifying which should be first.

SMSes are stored in a SQLite database, and it would be pretty trivial to append to one field the the contents of a few other fields based on a drag-and-drop interface. I'd code it, but I'm not experienced with Android development, and others could make such an app far faster.

I posted a request on xda-developers but the bozo admin there moved it and nothing happened.

3 Answers 3


SMS message concatenation seems to be a function of your phone's network technology (CDMA/GSM), the SMS application's support for the standard, and the message's origination/destination carrier combination.

Some carriers don't like long messages (over 160 characters) coming from other carriers and will not allow the correct message headers through to your phone, meaning your phone can't piece things together. A quick pulse of opinion on the issue also seems to indicate that CDMA networks are worse at transmitting concatenated messages, although the facts look to lean more toward the idea that CDMA was just behind the standards adoption curve. Your phone, of course, also has to know what to do with a long message when it sees one; mileage will vary.

Personally, when my dinc was stock it was very obviously up to Verizon to decide to give me a long message in one big piece - long messages from friends on other carriers were the only ones not concatenated. Now that I'm on MIUI the built-in SMS app seems to do better at it, but I don't text like I used to so I can't say for sure. I recommend trying various SMS apps, but you may be stuck under forces you can't control.

tl;dr - Many factors play into how long SMS messages are displayed on your phone.

(Info gathered from Wikipedia, research, blogs, and forum posts, among other places)

  • This is nice research into the history and tech details of SMS concatenation. The reality is that I receive messages split in parts of <160 characters. What I'm looking for is a very simple app that would let me select two messages and join them into one, specifying which should be first. Commented Feb 18, 2013 at 22:39

I've encountered similar problem and thought I might share my solution with the others who are having trouble with split messages. Maybe it's not the easiest and most "user friendly" workaround but it worked for me. Mind you that I've repaired (?) like this only about 40-50 messages - I wouldn't recommend my way for bigger amounts of SMS.

My solution:

  1. Download SMS Editor app by Ray Y (big THANKS for the author!)
  2. Find each split/corrupted SMS and by simple copy-paste and deleting chosen messages you should be able to put thing back in the order.

Hope this helps!

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    Commented Nov 23, 2015 at 4:27

I am confused what you are looking for. SMS messages are no longer then 160 characters. If you type a message longer then that, SMS apps, like the "core" sms app, or handcent show then like they are 1 message, but, in the background, they are still sent as multiple messages.

If you send a message that is 170 characters, you are sending 2 SMS messages. One that is 160, and one that is 10.

  • I'm looking for a simple app to let me merge consecutive incoming SMS messages. Preferably automatically (I came up with a simple algorithm and I'm doing this on SMS backup files (XML), but even manually would do, after the messages arrived in my inbox. Commented Jan 29, 2012 at 2:39

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