Chosen Solution
Where is the Gyro sensor in the iPhone 6s? Can it be replaced/repaired for a reasonable amount of money? The Health app does not register steps. Apple says this is the reason. Thanks
John lang as for the gyro you find it marked with the yellow square
InvenSense MP67B 6-axis Gyroscope and Accelerometer Combo (also found in iPhone 6) this may just be a task for @refectio
Definitely the gyro. Most likely this will need a logic board replacement iPhone 6s Logic Board Replacement
