I want to apologize in advance, this is going to be a long question: have this annoying and frequent problem with my Samsung Galaxy S3, when I try to make a phone call i get "Call ended 0:00" right away, the phone won't even dial it just says "Call ended 0:00" my signal strength is strong as well when this happens, the only way to get it to make calls is to power off the phone and restart it or toggle flight mode on/off. It is happening everyday, I went to the Koodo store and they switched my sim card worked fine for 1 day then it happened again "Call ended 0:00"...went back and they did a factory wipe of my phone and again worked fine for 1 day and then "Call ended 0:00"....YET AGAIN went back and the sales rep did this update over the phone from calling Koodo...same problem worked fine for 1 day and then "Call ended 0:00". Now frustrated i went again to the store and after a lot of talking to them they gave me a new Samsung Galaxy S3, I thought the problem would be fixed as they told me there was a batch of these phones that had this problem and i must of gotten one of them....Well, here we are again i still have the "Call ended 0:00" with the new phone when attempting to place a call. I called Koodo tech support last night and after being on the phone for half an hour the person did a debug of my sim card and said that should fix it....Today when i tried to call someone this morning i got the "Call ended 0:00" AGAIN. I don't know what to do anymore, i'm so frustrated...Does anybody else have this problem with their S3?? and how to fix it?? I also want to say that i have tried all the network modes, and they all do the same thing the only one that doesn't work is GSM i believe, that one i get no signal...but the others i have all tried and i still get the call ended issue when attempting to make a call. I have GPS/WIFI disabled...the only thing i have enabled is Data because i have data in my monthly plan. I have noticed when my phone is refusing to make calls, and when i get into an area that offers LTE my phone starts working again to make calls...where i live i can only get 4G for my data because i have no LTE but when i go to a town that has LTE my phone starts working again. Can this issue be caused by Data??