Google Play Services 10.2 has started to roll out [1] and it's introducing a pretty nifty new feature: Instant tethering. Basically it works like that: If - say - your tablet has no data connection and you also have a phone connected to the same Google account, it can automatically offer to use the data connection of the phone - zero setup necessary, just a confirmation (well after the initial setup, obviously, you have to agree to use that feature)

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