My Samsung U520 randomly turned itself off; is there a way to hard reset this phone?

I have 2 sgh-m919 galaxy s4 s from TMobile. Both phones were randomly showing the message "sim card not detected restart" and phone would reboot.. sometime would have to reboot 2 or 3 times before i was normal. I tried many of the net poste solutions including paper on sim card, clear cache, new battery etc. Nothing worked

This week i was ready to buy a new phone.. but was sure the phone wasnt the problem. I started deleteing apps one at a time and found the problem. It is GOOGLE MAPS !!! G0 into settings / more / application manager / slide over to all/ down to Maps /clear cache/ uninstall updates / force stop. Then turn off phone and restart. When you go to use maps or waze again when it asks for permission "decline" it will still work and you wont see the sim not detected restart message again.. Google the words google maps crash or reboots and see how many phones crash. Galaxy s4 happen to have the dialog box that makes it appear to be a hardware problem! Googles motto use to be "First do no harm" please reply if this works for you

Good luck!

same

your phone has a virus and needs a hard reset available at the lg store where you bought it or any other store than handles lg.

Try to replace the battery with a new one and check if it turn on.

you half to get a code which you should be ablee to get off the sam,sung website

FIRSTLY U MUST CHECK WEATHER THE PROBLEM IS IN YOUR PHONE AUR IN THE SIMCARD CONNECTION.YOU SHOULD TRY THE SIMCARD OF SOME OTHER COMPANY ALSO,SO THAT IT CAN BE CONFIRMED THAT WHERE IS THE PROBLEM.........AND IF YOU ARE SURE THAT THE PROBLEM IS IN PHONE THEN;  1.TRY TO ACCESS THE NETWORK CONNECTIONS AND SEARCH ALL THE AVAILABLE CONNECTIONS. 2.REMOVE THE BATTERIES AND THE SIMCARD AND RESTART THE PHONE AGAIN.
HOPEFULLY UR PHONE WILL WORK PROPERLY.
GOODLUCK.

I have a 540, and to take it off silent mode all I have to do is hold down the # key for a few seconds. Look for a picture on the key that looks like a vibrating phone...

enter code 1194

turn off silent mode on samsung sch-u520

try *2767*3855#