I don't think Google do thermal cycling on their phones as part of the development cycle. If they did, the phones would be much more reliable. If the phone c

I don't think Google do thermal cycling on their phones as part of the development cycle. If they did, the phones would be much more reliable. If the phone can survive cycling between -25C and 85C 2000 times, then it will most likely survive many years in your pocket. They should also test weeks of salt spray and hours in a tumbler with sand dust and lint.