Use a iFixit opening pick to gently pry near the SIM tray on the back cover.
Use a hair dryer on low heat to warm the fingerprint sensor in 30-second increments.
Disconnect the battery press connector using tweezers, a spudger, or your fingers.
If The Battery Is Expanded, DO NOT USE A HAIRDRYER or heat; be very careful when removing.
Be extremely careful not to puncture the expanded battery.
Use a spudger to detach the ribbon cable connected to the fingerprint sensor.
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