The iPhone 6s battery backup is very good, it gives 5 to 6 hours of backup on normal use and 4 hours of backup when playing games. A high-capacity battery has been installed after changing the battery. The front display has a slight crack but there is no problem operating it. SIM works, everything works, Wi-Fi works, SIM works. The fingerprint sensor does not work but the bottom home button works. If anyone wants to buy, the price is fixed.