Iphone6IOs11.4 system configuration 16g accounts for seven g's. How did you clean it yourself? Thank you for your answer!
Ios5. 1 1 is recommended. I used ios5. 1 1 and 6. 12 in my junior year 4. The system is not perfect. On that day, I was promoted to 6. 12, and I encountered a big shortcoming. My connection and wifi are unstable, and I often lose the network, so I was decisively downgraded. Use 5. 1 1, which is better.