So I've been lurking here for awhile I haven't found an answer to the issue that I'm having with two G1's. My fiance and her sister both got the G1 when it came out, both worker for about 6-7 months with no issues. My fiance was rather rough with hers (dropped several times with exterior damage). A few months ago, both phones started missing calls and not being able to send/receive some MMS. When I call her phone, it rings a few times and goes to voicemail, but her phone never actually rings. It shows that she has a signal though. Also, when she tries to send a SMS message, it sometimes shows that it's still sending even though I've already gotten it. At other times, it won't send the messages at all, and she can't receive them either. Here's whats weird to me. I though it might be the phone. So after arguing with T-mobile for a very long time, they sent a brand new one. I also had the SIM card replaced. It still has the exact same problems. It happens daily, but not all day. And it never happens at the same time. Does anyone have any idea what I should do? Both phones are running 1.6 I though since they didn't have problems for many months, that I should maybe try going back to an old firmware version and see if that solves the issues. Is there a way to go back with the firmware without rooting the phone?