Using a Motorola L6 phone on 2D which has been fine until this weekend when I found I was unable to send any SMS - gives me "Status 38" (Unable to send message).

Google gives me others having similar issues and are told to clear out their inbox etc as the phones full - mine is not however - all my mesasge boxes are clear.

Only thing different Ive done recently, is the SIM was used in an iPhone I was testing a for a couple of weeks. Was able to send messages from that fine.... this weekend though is the first time ive gone to send a txt since putting the SIM back into the Motorola.

Any ideas how to get the Motorola txting again ? Im pretty sure its not a 2D fault as such but more the phone....

TIA