I have cdm 8910 phone. Is it with sim ? Can it be made to work on sim? I am from india can it work on reliance or tata cdm service in india?

The 8910 has no sim card - Cdma phones do not operate with a sim card or on gsm networks. The only way to activate this phone is by contacting the carrier/provider you wish to have service (must be cdma also) with and provide the unique serial no. to have them add it on their end. Some imei's cannot be activated because they have been reported as stolen and must be taken with the original receipt back to the vendor to have it unlocked. If this is not possible then the only way around this is to change the imei of the phone to one that is clear (cloning) but this is illegal to do and may disable certain functions of the phone as well.