I need to get a battery for the motorole K7gsx900

Go to the following web page and download the manual: http://www.manualdisk.com/pdf-/motorola-walkie-talkie-fcc-id-k7gsx900-range/

Make sure they are on the same channel

Be sure the channels and codes are set identically on both radios.

Please specify the motorola model correctly,because BR50 is Motorola battery model.You can get the Unlock code for Motorola Phone at Mobileunlocksolutions.com and Unlock it easily...

A request for a PUK code ("Personal Unlocking Key") will appear on your phone if your SIM card PIN code is entered 3 consecutive times incorrectly.

Your SIM card will then become "PUKed" or Blocked. This is a security measure to protect your service.

You need to call the Customer Service department of your cell phone provider and they will give you the PUK code which will unblock your SIM card.

This is typically a sign of a bad or low battery. Try swapping the batteries with a known good unit and see if the problem goes away. If so, replace the battery pack. If it is not the battery, the radio has a deeper problem.

Best regards.

teh best way is to call up your service provider and ask them for GPRS, they will send you the settings by SMS or on phone they will tell you.

the best solution to your prob.
is to master clear your phone and master reset,