My Nokia 520 suddenly stopped displaying my sent text messages, and the only way I have been able to view incoming texts, is the fist line on my home screen. As soon as I go into view the thread, nothing new is there. Apparently the person on the other end is seeing my sent messages, but on my end, nothing is registering. What could cause this? I just purchased the 1,000 airtime minutes about 10-15 minutes before this happened, is it unrelated? I've had the phone for over 2 weeks now and it was working fine. Except I have been unable to receive pictures texts. But I do not have cellular data, does one have to do with the other? What do I do? I tried taking out battery and SIM card for a minute, same. If someone can advise me one this, I will be eternally grateful! Thank you!