I don't have a problem just a question.

The average life of the RAZR phone is approximately 2 years battery life and depending on the handset itself it culd be up to 4 years or more.

The lifetime of the phone is probably unimportant. That is, the phone will last many many years if you take care of it (like most electronic devices). What is important is how long will the battery last under normal circumstances before you need to replace it. I would say that with regular use, you should expect more than one year, to almost two years of use before the battery starts to not hold a charge and will require replacement.