Why is my phone's GPS inaccurate after updating?

Mark from Riverside, CA

Episode 1347 (38:09)

Motorola Moto G

Mark drives for Uber, but now his Moto G Android phone is having GPS issues after updating. Leo says it could be that his GPS is damaged or he got a bad update. He should try restoring the phone first. But since the Moto G is a few years old, it may be time to get a new one. They're pretty cheap.

Can he go back to the previous Android OS? Leo says he may be able to, but Marshmallow was an important update.