Get your service centre number from your provider and enter the number.
for eg in India
Airtel
Karnataka - +919845087001
BPL
Mobile India +91-9821000005
MAXtouch
India +91-9820005446
Essar
Cellphone +91-9811009998
Tata
Idea AP +919848001104
Command
+919830099990
AirTel
Delhi +91-98100-51914
Skycell
Cellular +919840011003
Spice
Karnataka +919844198441
Spicell
+919831029222
Usha
Martin Telekom ltd +919830099990
Airtel
Andhra Pradesh +919849087001
RPG
+919841044446
Airtel
Karnataka +919845087001
Escotel
Kerala +919847099996
Escotel
UP +919837099995
Escotel
Haryana +919812099995
Celforce
+919825001002
Aircel
+919842201155
Orange
+919820005444
Idea
Maharashtra +919822078000 +919822178000
Idea
Chattisgarh +919826012311
BPL
Tamil Nadu +919843000040
BPL
Kerala +919846000040
Hutch
AP +919885005444