How can i repair my nokia 6300 mobile phone?

my nokia 6300 repeatedly comes up with 'call rejected' after attempts to call or text. I had it unlocked about 2 months ago and it has worked ok since.

sim card works ok in another phone. network provider name (t mobile uk/virgin mobile) comes up on the screen.

a different sim still does not work
bob booth, April 2008


done
my nokia 6300 turns on displays charge but otherwise screen remains white

Raymond, July 2013
I THINK THEY BLOCKED U BECAUSE IT HAPPEND To ME CALL THE SERVICE PROVIDER

Adam, October 2009
I THINK THEY BLOCKED U BECAUSE IT HAPPEND TP ME CALL THE SERVICE PROVIDER

Adam, October 2009
what are the codes for Nokia 6300

naveed, July 2009
I am facing battery problem which discharge with in 20-25 minutes call. I have replaced new one and charge 12-14 hours but still problem is their. Please tel me what problem is?

naveed, July 2009
what are the reset codes for nokia 6300

chris, June 2008
try a reset code for your phone type it in google

FAHEEM, April 2008
link Click here to see other fixes for Nokia 6300.