My Galaxy S4 continues to crash, have no cell signal or internet signal since the last update. Can someone please help? I didn't have this problem until this last update and it is really aggravating!

Question

Since this last update, something has happened to not only my phone, but to my daughters phone as well. We are constantly having to restart our phone and have no cell coverage or internet access in places we used to have no problems at all. This is very aggravating and I am ready to ditch the phone for something else! Please help!

Answer 1

I have a S3 and this is driving me crazy.  I have taken the battery out (left out for 2 hours in dark place inside original box, SIM card out, hard reset, soft reset, and anything else I could think of including going back to factory settings.
My phone will turn off in the middle of something I am doing.  No matter what it is.  I still get signal and am able to talk to people.  But I use my phone for work and it is starting to get annoying when you have to re-start the email you were typing because your phone turned off and a draft was not saved.
This is my replacement phone that I got back in March/April of this year.  I have an otter box for it and had no problems with the other phone until I dropped it (no otter box).
Not to mention my battery will say its like at 80% in the middle of taking a picture and then it wont turn on until I have connected to a charger because it wont turn on without it because from the time I wanted to take the picture to when I turn it on, I lost 75% of my battery.
Or if I get lucky and it will turn on, I have lost half of my battery charge no what percentage it is.
Please help me fix this as I need a working phone and it is not great having to carry a portable charger with me at all times.