my phone is showing no signal but I have always got signal in my house and all of a sudden I can't get signal. I have rebooted my phone and still nothing.. I NEED HELP NOW. IT'S MAKING ME MAD.
Try putting the phone in Airplane mode for a few minutes to turn off all the radios. Then turn Airplane mode off.
I would normally suggest pulling the battery, but the HTC Rhyme has a non-removable battery.