Motorola razr v3 can receive text messages but cant send.. help just bought on ebay new and unlocked for att or t- mobile..

I have the same problem, i did as souma said but the number was the same one that was already on my phone.

Call ur compie service #

I don't know what the service number is :[ And I don't know how ti fix it.

I don't know what the service number is :[ And I don't know how ti fix it.

Call ur service provider's customer care help line . Ask for <message/service center number>.Then go to ur phones message option>click the center -- key> then goto the message setup> text message setup> service center no...>

Change the no. with the number given by the customer care and then click <Done>. come out to the Home screen > restart ur phone