According to Apple, the random shutdown problem touched “very small number” iPhone 6s, and if specifically, issued in September and October 2015 models. Complaints independent shutdown devices, even when charged battery began to arrive in early 2016, but soon discovered that the problem is solved by installing the latest firmware.
All owners of the iPhone 6s recommends that you contact the service to check the serial number of the smartphone – authorized service centers already have a list of numbers of smartphones, whose batteries must be replaced. By the way, a replacement battery for the owners of these devices will be free, and those who are due to a malfunction of the battery is replaced before, please contact the Apple Store to return the spent money to replace.
Find out the approximate date (up to a week), when he was released on iPhone, you can here. According to unconfirmed information, the serial number of the device to be repaired should have such designations on the 4th and 5th positions : Q4 is the Q5 the Q7 the Q6 the Q8 the Q9 the QD by QC QF QG the QH
From the Apple believed that the cause of the strange behavior of the devices is a problem with the battery, so within a running program free of charge to replace the batteries in smartphones.
Apple representatives have warned that if any other mechanical damage iPhone (eg, cracked display), carry out the installation of the new screen to the battery replacement procedure.