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I had the same problem yesterday and had no idea what was wrong for several hours. I cleared the cache on the phone and it worked for about 30 minutes then the pop-up would come and stop everything. Since WiFi was still working I forward my number to my Google Voice number and made calls and got my calls and texts from it. I called LG and they gave me a list of things to do that worked for several hours then stopped. I called my nephew who is an aerospace space engineer for NASA he called me back and told me me to do this. He said it's the newest LG fix. I did it yesterday and it's working just fine.Put the affected LG phone in airplane mode by pulling down the notification shade and tapping on the plane icon.Putting the phone in airplane mode should stop the IMS error message from popping up.Open the phone's settings and tap on Apps and Notifications, followed by App Info.On the App Info page, click on the three-dot menu icon in the top-right corner of the screen and tap on Reset App
How To Redeem $50 Rebate
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