I am using Nokia 1200 since 12 years.only I can changed battery and it’s body three Times.calling system of this phone is excellent.it’s doesn’t stop anywhere.battery backup of this phone is 3 to 4 days in calling.network of this phone is very very strong.sound and mic quality of this phone is excellent it is small in size and keypad of this phone is very smooth.no heating problem in this phone no network and calling problem in this phone.Nokia is very old and trusted brand it’s phone is very strong and Nokia 1200 is also very strong.