Anyone had this problem? My son's Pulse is about six weeks old now and all of a sudden it's stopped connecting to the mobile network. Have tried: Power down and back on. Power down, battery out, sim out, leave 30mins, back in, power up. Swap his sim and my sim (also T-Mobile, G2) and his sim works in my phone, his phone won't connect with my sim either. Applied update already from T-Mobile web site. Will be taking it in to store tomorrow but I know that the tubbies in store will be clueless as usual. I'd rather have a replacement that have it sent away and my son be without a phone for weeks. Wonder (a) if anyone has seen ths before, (b) if there's any way I can demand a replacement instead of repair and (c) if they send it away and he's without a phone are T-Mobile in breach of contract by not supplying the service we are paying for? Ta.