Last night I swapped batteries out when one was dying. I usually keep a spare, charged battery on me. When i turned on the phone, the clock was 3.5 hours off from the correct time. For example at 9am, the clock on my phone now says it's 5:30am. I also can't send outgoing text messages. I can receive texts. When I hit send on a text message, it just disappears. There is no error message.