2. Unlocked , accept 2G 3G networks , before you order this phone , please confirm your carrier has 2G and 2G networks in your area .
3. iphone 4 run ios 7, iphone 4s run ios 6 and ios 9 , we clean all date in the iPhone , but we still can't promise you can sign in
your apple ID . apple stop provide service for the ios under 12 .
4. New version app no longer compatible with old version iOS , you should download old version ios compatible with the old version ios .
5. the battery can't last a long time , maybe 1-2 days .