My nokia 6630 only shows the word nokia and the test mode

offline problem in my phone when changing another sim card

virus problem

hi

to formt the 6630

hold * button + Green Button + 3 Button
and power on
till formatting will appear on the screen

a tricky combination ha ha ha but well it works

press the side button or check the phone's user profiles, there you will need to select the phone to connect online.

you will need to set your phone to become connected

help me delete my phone memory

Format your phone by dialing *#7370#
and it will be fine.

standard code is 12345, if u dint chang ur code.try it

This is the purely your GSM network provider error.You gota contact their helpline

Hi! This may sound weird but have you tried checking if the sim holder is loose? Maybe the sim is not touching the terminals on the phone.

hi! may be you do not close web and just switch to oher applications. this cause the current open application to run in background which consumes bettery! make sure to close applications properly.here is the tip "press and hold menu button, it will show list of opened application on top left of the screen, goto those applications and close them"
hope it will work!