Like many of you out there, I have a Samsung Galaxy Note 2 that keeps shutting down without warning. In my case, it has *nothing* to do with wifi or applications. My research led me to this site and a video posted by "dpham00", who also posted a link to his site at Verizon Galaxy Note 2 Shuts Off. Kudos to him for his hard work and efforts!
So here's how I fixed mine: realizing the phone was shutting down when bumped, jolted, etc., I figured it just HAD to be a power interruption whenever it was slightly bumped or jolted (like when in my pocket). That led me to the battery as suspect number one. I opened the back-plate and noticed I could move the battery up and down just a fraction of an inch )closer to 1/3 of a millimeter. It was so light, some of you might think it wasn't actually loose, but it is! I searched the kitchen junk drawer and found an old Cigna health card made of that thin, laminated paper. I cut off a thin strip about an 1\8" wide, and about 2" long. I then wedged it between the battery and the phone frame (at the bottom of the battery), assuring a super tight fit against the brass contacts at the top of the battery.
Next, I replaced the back-plate, powered up, and BINGO!!!!! No more broken phone!!!! I have tested it for 48 hours now, even performing the "test drop" from several centimeters above the table top. I have carried it in my pocket, left it running, I've done EVERYTHING I did before. It has not shut off ONE TIME!!!!
In case you're wondering, mine was shutting off about 4 to 5 times a day. It was driving me crazy!!! I truly hope this post helps the majority of you out there with this aggravating problem (and I think it will). Best of luck to all of you!
Mark
So here's how I fixed mine: realizing the phone was shutting down when bumped, jolted, etc., I figured it just HAD to be a power interruption whenever it was slightly bumped or jolted (like when in my pocket). That led me to the battery as suspect number one. I opened the back-plate and noticed I could move the battery up and down just a fraction of an inch )closer to 1/3 of a millimeter. It was so light, some of you might think it wasn't actually loose, but it is! I searched the kitchen junk drawer and found an old Cigna health card made of that thin, laminated paper. I cut off a thin strip about an 1\8" wide, and about 2" long. I then wedged it between the battery and the phone frame (at the bottom of the battery), assuring a super tight fit against the brass contacts at the top of the battery.
Next, I replaced the back-plate, powered up, and BINGO!!!!! No more broken phone!!!! I have tested it for 48 hours now, even performing the "test drop" from several centimeters above the table top. I have carried it in my pocket, left it running, I've done EVERYTHING I did before. It has not shut off ONE TIME!!!!
In case you're wondering, mine was shutting off about 4 to 5 times a day. It was driving me crazy!!! I truly hope this post helps the majority of you out there with this aggravating problem (and I think it will). Best of luck to all of you!

Mark