New iPhone 5s shut off unexpected and won't turn back on

OMG, JUST had my 5s randomly shut off about 20 minutes ago!! I was panicing so bad to the point of tears because I didn't know what was going on; it doesn't have damage, the battery had just been fully charged & the software is up to date. Hopped online,thank god I found this post! It took about 6-7 seconds to power on. The Apple symbol showed up for about a minute then the homescreen showed up. Like nothing happened, but this still makes me nervous as to why because I've had the phone since mid January of this year, nothing like this has ever happened! Thanks Shaik for the help 🙂🙂

Thank you very much worked for me too.

OMG! Thank you so much!!!! My iPhone 5S turned off at 100% battery this morning and wouldn't turn back on, I freaked out!! Holding down all 4 button for 20 - 30 seconds (don't remember) worked for me. Thank so much!!!

Thankyou soo much you just have to hold all four buttons down!!!!

Thank you very much done the same as you told after 20 sec it came back again thanks alot !

My phone just did this today. But Ive tried holding all the buttons for 2 minutes and still no response. The LCIs are fine, and there is no visible damage that I can see. HELP!!

Thanks for the help! This worked for me.

Holding down HOME button, POWER button, and both VOLUME buttons for about 20 seconds -- WORKED. Thank you so much!

that just happen to me 5 mins ago im a little bit concern as why it shut off like that

This has happened a couple times to me, as well. Very strange. Does anyone know why this is happening?

So glad you were able to resolve your issue!

Thank you!!

God bless you!!!!

thank you very much

Even mine turned off two times today......when its turned off for second time i was about to die......... it happened after iOS 8.2

I don't know what you guys gonna do with it........... but i have a perfect solution for all iOS 8 bugs

Next month I'm getting myself a Samsung Galaxy S6 edge.....at least there is something new......and i don't need a laptop for songs,movies,videos

Plz reply guys if you agree that now Apple don't care about previous devices...There are tons of bugs in iPhone 5S since very first update of iOS 8 in September

my iPhone 4s running on ios 8.1.3.......hangs and lags like a $50 Android phone