Why do my messages show delivered but no messages appear on the handset?

If you have confirmed that your messages are being delivered to their destination network and the destination handset, yet you are still not receiving messages, then these may have been dropped silently (without error) by the handset.

It is a common practise by a mobile handset to drop binary messages silently if it is unable to decipher the UDH (data header) or if it believes the messages has been sent in an incorrect format.

This can be identified by sending the same message to a different handset / network and noting the result. You should also note that if both phones are unable to display the message then the original message may have been constructed incorrectly.

More help available from technicians via our online support system.