I lost the charger to my old phone, so it became useless.. I decided to move my SIM card and everything to my mom's Galaxy S that she no longer uses. I had unlimited texting on my old phone, and it still worked on the Galaxy S.. Well, up until a week ago. My friends told me that they receive my texts to them, but when they replied I could not receive them. I deleted every single text to see if that helped because I thought maybe my inbox was too full, but even after I deleted everything I still couldn't receive people's texts. The calling still works though. And my company is AT&T.. SOME ONE PLEASE HELP!! THANK YOU!!