It depends, the new nokia phones’ chargers are thinner than the old ones. so if you wanna switch between two old phones it would work, same goes if you wanna switch between two new phones. But from an old phone to a new one it wouldn’t work.

Old chargers :
( It’s a USB charger but I just wanna show you the difference between the 2 pieces which you plug into your phone in both chargers )

New chargers :
(notice the thinner metal tip )

Oh I just remembered..if your charger is old and you wanna get a new phone It would be cheaper for you to get a Nokia Charger Adapter, it’s an extension for your old charger and it has a thinner tip.

Here’s a picture :

The charger itself should have a model number; I’d suggest looking it up online to see what phones accept it.

Here are the accessories compatible with your phone:

From there it must be that the charger you have is the “Nokia High Efficiency Charger AC-8″

If that is true, here’s the compatibility list for the same:, some 77 devices