MY X's touchscreen is so unresponsive outside at 6° Celsius that it become barely unusable for quickly typing texts on the go. It's definitely only happening outside in the cold, inside everything works great. But I observed it for 3 days in a row now...
Do you guys think it's worth waiting for the possible Update Apple is gonna push out, or would you try to get the unit replaced?[/QUOTE
iPhone's reliability, in general, is very poorly in cold. My 6s+ battery would go berserk once the temperature drops to 40F and now my iPhone SE is having the same exact issue. Now seeing this issue convinces me that there is just something wrong with iPhone's internal. I still remember vividly the touch disease issue on the 6 and 6+ which Apple never owned up to its mistake.
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Usually when it gets that cold, people stay inside. So...have you used your X for an extended period of time outside? Having it in the pocket keeps it warm too so just have to keep that in mind. The best test, at least for me, is when I put it on a tripod and film my team for a basketball game outside. The phone would go berserk both the screen and the battery.
"when I put it on a tripod and film my team for a basketball game outside."
for that kind of picture I am using my Canon 5D MK III