I have been recetntly not been able to send text messages on my HTC Evo 4G. I got the error code 97 class 3. Called Sprint first time, didn' fix it. Called Sprint again, fixed it but now I receive my text messages late and don't receive calls at times. I don't know if it's my phone or Sprint doing this but it is really frusteratiing especially when I'm waiting to hear back from a new CNA job. This hasn't happened to me until recently. Could it be due to the updates they're doing or should I just get a new phone or activate the other one I have?