Cant make calls, saying my lg is on airplane mode

"Hi,

This link may be of relevance to your problem.

http://forum.xda-developers.com/sprint-g...

You may also wish to try a hard reset of your phone to see if this resolves your problem.

Be aware that a hard reset will erase all your downloaded apps and user data and restore your phone to a factory default condition. It will be like when you first bought it.

You may wish to backup your data first.

Before performing a hard reset ensure that the battery is charged. Do not perform a hard reset with the charger connected.

Here is a link that shows you how to do it.

http://www.hard-reset.com/lg-g4-hard-res...

Be patient, it takes a few minutes."

"Try change the battery that help me

Just that"

My sons phone did the same thing. I cleared the cache then instead of message to turn off airplane mode it said it needed 911 installed. Somehow the 911 phone number got deleted so when I added it back in, the phone now works, doesn't give error messages and can make calls

For mine I had to reseat my sim card. I opened the case to see if it would do the same thing with no sim card. I pushed my sim card back a little and removed the sticker on top that was coming off. I expected it to say no sim card when I turned it on but to my surprise it said service. Finally, the problem was over. I dont know if it was pushing to sim card back or taking off the sticker (maybe it was snagging something) that worked. But between the two. It worked.