It does have it, all cellphone batteries that are removeable ( at least the lithium ones) have the protection circuit in there. Only ones that do not are the dodgy mystery ones that you buy in a shady shop, which come in a plain pack with the phone model scribbled on it, and where you might be able to fit it in the actual phone with only a little work, but even most of those have the protection on the cell.
Simple test, are the contacts gold plated PCB material, then they are part of the protection board in the end. Otherwise simply charge it with a 5V supply and a series 1R resistor, and check the voltage is 4V3 for the most part, then rises to 5V and the current drops to zero at the same time.