Why can't Bluetooth SMS be sent out?

There are two possibilities. The first is that, as upstairs said, the other party's memory is full.

The second possibility is that there is something wrong with the Bluetooth module of one of your two mobile phones. You can try to send it to different people and see if the result is the same.

The third possibility is that the pairing of Bluetooth versions of your two mobile phones is limited. In fact, we can often find this situation. We can use Sony Ericsson's Bluetooth mobile phone to search for any brand, and the transmission is good. However, if we use Nokia's Bluetooth to search for love, we often find that there is no device. This problem also exists between Nokia and Samsung, which is the compatibility problem. Manufacturers have slightly different specifications for Bluetooth. Or brand restrictions.

At present, Sony Ericsson has the best Bluetooth compatibility. Because Bluetooth technology was originally developed by Ericsson. You can determine what the problem is by eliminating it.