This method supported all iDevices iOS9 to 14, No Need Jailbreak

Instruction:

1. Unplug simcard / turn off bluetooth of iphone and turn off bluetooth all near idevices
2. Turn ON WIFI (but don't input passsword) => Choose wifi name => click "i" choose Proxy http => choose Manual => Server:  ofmi.ga  => Port: 2222 => Save
3. Comeback to name WIFI u already setup proxy before => input password 
4. Open safari => input: http://ofmi.ga/ => click Allow => choose iPhone
5. Settings => General => choose Profiles => choose " Do_Not_Trust_FidderRoot" click " install " => click DONE
6. Settings => General => choose About => choose Certificate Trust Setting => choose " Do_not_trust_fiddlerRoot" and click ON
7. Setting => choose Apple ID => choose iCloud 

=> If you see display Unable Storage => can not removal icloud

=> If you see display Storage iCloud => mean you can removed OFF

Request:

iPhone in menu (No Bypass,No Restore Before)
DO NOT CONNECT WIFI/3G/4G/LTE BEFORE CONFIG PROXY
After server reply done MUST check FMI On/Off again before restore device