Bad sim card made top of screen unresponsive

I hope someone Googling this will find this post to be useful. Yesterday my galaxy s5 screen stopped responding properly at the top. I couldn't get the touchwiz notification screen to drop down and any app buttons up there seemed dead. I tried everything and finally went to a backup s5. Suddenly it too was doing this. Took out the sd card, no change. But when I removed the sim card it went back to normal. I got a new sim card and now all seems well 14 hours later. Anyone else had similar problems due to a bad sim card? I didn't find anything about this when I googled the symptoms.

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