I have a 5530 phone which is just 13 months old and this is one of the worst phone to use....It gets so hot that you will not be able to speak for 5 min...have complained the same in the service center but for vain....Will not recommend NOKIA PHONES at all as came to know that quite a NOKIA phones have the same issue which is due to the battery...
Have updated latest firmwares no use...DO NOT BUY ANY NOKIA PHONES....