BSNL FOR ALL INDIA

Dial 164 and call or *8888# - to know your Mobile

Number. *123# - Balance and validity details
*123*10# -GPRS data balance check
*123*1# - SMS local
*123*2# - National sms
*123*5# - Network call
*123*6# - local network call (data bal check for UP)
*123*8# - Night GPRS pack
*123*9# - video call bal 9400024365- Customer care Eastern region