Anything purchased directly via Google Store. Mostly Nexus devices, but Google Cast, Pixel C, Chromebooks, etc. But not any OEM running android, no. Mostly the reason I gave up on Samsung. I can't stand dealing with carriers or OEMs directly. Perhaps Samsung has better support now, but in the past, it was very painful. That is across the board too...Televisions, Appliances, etc.
If that's still true of Samsung CS, then I'm glad I go through T-Mobile. T-Mobile CS is generally terrific, both in store and over the phone. And because I'm a familiar face and friendly to the T-Mobile manager at the one near my work, they are extra friendly and helpful to me. I treat them with respect and don't abuse their courtesy. Sounds like it'd be hard for Samsung to match this sort of CS.
Speaking generally, T-mobile really has been terrific. Great plans and prices. Good coverage. Great CS. Light on the bloat. Reasonable with security and software updates. And AMAZING promotions in conjunction with Samsung.
T-Mobile + Samsung = great overall experience. It ain't no match for the many available Apple Stores and their CS, but it's great enough.
And to be perfectly honest, Apple CS in the past year or so has been monstrously difficult and frustrating. Had to take Macbooks and Thunderbolt Display to them multiple times before resolution, and each experience included long wait times and difficult scheduling. Going through the process, especially multiple times, was a huge pain.
That's why I was glad to read Apple plans on retooling how their Genius appointments work. It's seriously overcrowded to an obscene degree.
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Not going to happen. It would compete with "Geek Squad".
Also a good point. But I know for a fact that Best Buy no longer offers their Best Buy warranty (is it all Geek Squad?) to Apple products anymore. The Best Buy rep recently told me that all Apple products simply have AppleCare. Just like buying from the Apple store. So, that's sort of interesting.
Who knows what Samsung can work out with Best Buy. But you're right, Geek Squad would be an obstacle.