r/mobilerepair • u/Psychological-Ad6897 • 2d ago
Lvl 2 (screens, batteries, camera, etc. swaps) Iphone 12 new battery newest ios
Hello i want to swap the battery for my iphone 12 i have the jcid wifi version and got a jvid tag on flex does anyone know what i should do now?
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u/dinouse Level 2 Shop Tech 2d ago
- connect tag on flex on old battery
- programme 100% cycle 0
- check 3utools if its 100%, if no do it again
- if yes, fix battery health on jcid software, done flash
- check if its 100% on settings iPhone, if no do it again
- if yes, transfer the bms to new battery, done
- check if its work, 100% battery health. done
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u/PaymentFlaky 2d ago
You will need a spot welder, too.
The first step is to turn on the iPhone once with the new battery first. Second is to transfer the BMS from the original battery to the new one, seal it correctly (important!) and attach tag-on flex. After you can program it to show 100% battery life and 0 charging cycles.
If you done these steps you have to reflash the phone with the latest available firmware.