Iphone 5s Data/baterry issue after upgrade IOS 8.2

Hi,
I updated my iPhone 5s to iOS 8.2, and now I have the below issues:
Network Signal in an area where i have full signal before now it is weak. I have also lost all Data Connection in an area where i always get 4g
Battery big problem, since I need to charge at least 2 times during the day, and night time with all apps off if I have left 40% battery the phone will go off at 06 a.m.
My WI-FI keeps losing connecting for any apps, this is not an issue with my provider since all other devices work fine.
Phone temperature will go high, enough to fry an egg.
I did install the IOs 8.2 a second time using Itunes SW and did not improve a bit.
What should I do to have this fix? I don't have any more a smart phone or a mobile phone.
Is Apple doing all these SW releases with a proper test?
I'm very good engineer, if required I can help to improve this service.... , well only if this is a way to sell more Iphones 6?
Regards
Marcos

Hi mbmarcos2,
I'm sorry to hear you are having these issues with your iPhone; I know how frustrating that can be. If you continue to have multiple issues with your iPhone, especially if they began shortly after a software update/upgrade and persist after a reinstall, you may want to make sure you have your data backed up, then try restoring your iPhone to factory settings (which will install a fresh copy of the OS) and testing it in that default state before moving your data back. You may find the following article helpful:
Use iTunes to restore your iOS device to factory settings - Apple Support
Regards,
- Brenden

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