The Op's criticism of the otterbox was vague at best. " It caused my phone and sim card to overheat" means what? Did the phone enter protection mode? What was the internal temperature that constituted a condition described as "overheated?
This "information" was not helpful it was groundless, baseless and a stab in the dark.
Removed the case and ALL was well? Really?
As an example, just to make the point. I took my phone and looked at my battery app, temp was 94*F took the cover off and waited, now it is 84* Otterbox ? Possibly something else?
- It was in my pocket, now it's not. Maybe my pockets are the problem.
- May have had some internal operations running then that aren't now running, no way of knowing.
- Is 84* or 94* an issue at all? I've heard of temps approaching 120*....?
- In my stat history, my low 62.6* and my high 95* - BOTH and all in between were with the case ON ? What does that mean if anything?
- I have no way of knowing what each pieces operating temp was (phone, battery, sim, circuit board, etc)
- Maybe the case keeps the phone from running hot sometimes that if it wasn't on the phone would heat up more quickly or run to an even higher temp. example: phone is inadvertantly left in the sun.
I doubt a viable technology accessory company would take a product to market and survive let alone succeed if their design was so fundamentally flawed that it would take a temperature sensitive devices' operating temperature to dangerously high levels.
Update: As mentioned, temp went to 84* when I took the case off. I waited until it went to and seemed to stabilize at 82.4*.
So, I reinstalled the case and left the phone while I went and took care of some stuff (approx 30 minutes) temp is now 78.2* with the case still on.
Doesn't sound like very conclusive evidence.
I do know one thing. IF I drop my phone with the case OFF the outcome WILL be very different than with the case ON.