There are hundreds of sites online that can help you obtain cell phone records at a very nominal cost. I would like to caution you though, as it is an illegal process. There are several brokers and private investigators who offer cell phone records. Where do they get the data from? They might be having some inside contacts in the telephone companies whom they bribe and retrieve information.
Some of the investigators also use a method called "pretexting" to obtain cell phone records to sell. In pretexting, the broker or investigator pretends to be the cell phone number account holder and persuades the employees at the phone company to give them the information. This is an easier way. You can also try this at home. You need to provide the social security number of the person you need to obtain the phone data of and provide it when asked by the agent.
Some of the investigators also use a method called "pretexting" to obtain cell phone records to sell. In pretexting, the broker or investigator pretends to be the cell phone number account holder and persuades the employees at the phone company to give them the information. This is an easier way. You can also try this at home. You need to provide the social security number of the person you need to obtain the phone data of and provide it when asked by the agent.