After upgrading to iOS 7.0.6, I get intermittent "invalid SIM" error.

After upgrading to iOS 7.0.6, I get intermittent "invalid SIM" error where the carrier strength (top left corner) should be.   Of course I loose all data and cellular connections at that time.   The only workaround is to power the device off and back on.   I have to do this at least once every 2 or 3 days since the upgrade to 7.0.6.   Anyone else having SIM related errors since the upgrade? 
This happened once before when I first updated to iOS 7.   The next patch that Apple sent out resolved the issue, and I haven't seen it again until now.
I hear 7.1 may be coming out as soon as next week.   Any chance this issue is resolved in that release?

Thanks for the input.  That link shows steps that I've already taken.  I know it sounds weird, but I believe it may be software related.  Like I said before, this happened once before when I first upgraded to iOS7.   I lived with the issue, having to reboot the phone every couple of days, until the next update from Apple.  Once they sent out the next update, the problem went away. 
If it is not software related, then it must be a corruption of the software download and installation.  I did it over the air.  Possibly downloading whatever release comes out next will fix it because it's a new installation.  The software itself may not have the fix in it, but the act of downloading and installing the new software may fix it.  Just a thought...

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