What does FTM mean on my phone?
FTM = Field Test Mode

Try removing the battery to turn the device off. Replace the battery and then turn the phone back on and you should be out of FTM.

FTM, i believe, is usually entered by holding a button combination down when turning the phone on. Sounds like you accidentally figured out that combo when you turned it on. It could be as simple as "holding the power button while turning on".