In Nokia BB5 Local Mode or Nokia BB5 Test Mode problems occur because of the Software Problems, in some cases it may be caused by hardware problems too. Whenever you get this problem First thing you should do is Flash your phone with same or Latest Firmware of the Cell Phone available at the time. Then write a good Permanent Memory(PM) file of your phone. Then Do a complete Unlock and check if the Problem is solved. Before Doing any hardware solution you should clean the Motherboard of the Mobile Phone.Download the file below for lacal mode all bb5 models.