Bought phone used. Help.

Hi,

Try a hard reset on the phone. (Also known as a master reset)

A hard reset will erase all downloaded apps and user data. It will restore the phone to a factory default condition. It will be like when it was new.

Before performing a hard reset, ensure that the battery is fully charged.

Do not leave the charger connected when performing a hard reset.

Remove the external SD Card if any inserted.

Here is a link that shows how to do a hard reset. Scroll down to the section which describes how to perform a hard reset using the hardware keys.

https://support.t-mobile.com/docs/DOC-30...

Be patient, a reset takes a short while to complete.