i've sent my 830 back for exchange/repair 3 times since i bought it (january 12). Today was the 3rd time.
1st - back cover didn't fit properly. I was ok with it, it happens.
2nd - Glance screen and Double tap to wake often failed to respond; screen flickerd when brightness was set to very low using Brightness Profile; navigation buttons occasionally failed to respond and had weak vibration and, to top it off, the call speaker on the front had an aesthetics fault on it. Three weeks without my phone. I was ok with it too, i didn't notice anything before.
3rd - Same as 2nd. Since they didn't fix anything at all the 2nd time (they merely did a "software update"; the phone returned exactly like a sent it, with all the same issues), i had to send it one more time. I mean, don't they run tests to see if the problems are gone? How can they deliver it back to me the same way they collected it? Probably three more weeks without it.
honestly, so far i feel like i just wasted money as i'm about to stay longer without my phone than with it. I'd feel ashamed if someone i recommended Lumia for had to go through this. If they can't fix it this time i'm feeling like asking for a refund and buy a Moto G2 like everyone else these days
