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hi, my iphne is shut down unexceptedly i replaced 3 batteries, restore 3 times and nothing work. the u2 ic chip isn’t broken and in battery health setting i have this massange: “This iPhone is unable to determine battery health. An Apple Authorized Service Provider can service the battery. More about service options…” how to fix this issue??
The first thing to check with the iPhone 6S is to see if your device is identified for the Unexpected Shutdown Recall. Go to this website to see if your phone is affected. If not, then your battery may be depleted or defective (there are lot’s of cheap batteries on the market). To be certain, use a utility such as coconutBattery (for Mac) or 3uTools (for Windows). It will tell you what the health of the battery is. Anything less than 70% of design capacity will require replacement.
