phone is from US cellular. using Tmobile. everything works good, except text messages. if i send a short text, no problems. if i type a few sentences it won't go through. i can see MMS next to the text and the little loading circle just spins and spins and eventually i get an error message - currently unable to send your message it will be sent when the service becomes available. i also can't send or receive pictures. i tried google searching but have not resolved the problem. mobile data is on. anybody have a solution?