mobile

Hi, I've had my note 4 now for 5 months and I use it a lot. As a tradesman I use my phone to play music through a bluetooth speaker (bose soundlink mini) as I did with my note 3 but on occasions this phone would randomly reboot itself. The problem was so random I tried everything I could think of including hard reseting, downloading a fresh copy of the music files I play plus switching storage media. So here is my conclusion to the problem and now I'm aware of it,it never happens so I would like to share this with you. Firstly I downloaded a radio player app so I could continue listening to music and I have tried a couple and they work fine the phone has not rebooted at all, I should also point out that when using the phone in hand it never reboots. Using the radio app I noticed the phone remains warm not hot due to certain processes going on in the background. In summary the phone only reboots when it's cold and it's almost certainly the reason for my problem as now I leave the phone in my pocket when using mp3 player it's fine however this restricts bluetooth range. Now the weather is warming up I'm now able to leave the phone in a window again without problems. It seems as though the phone will run superbly even when it's warm/red hot in my hand but a little bit of cold it becomes unreliable. So my question is when the cold weather returns can I boost bluetooth so it makes the phone work harder as it seems as though using its internal mp3 player and bluetooth is effortless for the note 4? Big fan of the note series and I hope this can be fixed with an update but I've never had this problem with the other notes I've had.

Sorry for not quoting actual temperatures but I live in the uk if that helps.

Thanks Fred