IPhone 4 iOS 4.3.5 'No Service' and 'No Sim' Problems

Ever since I updated my iPhone 4 to the latest iOS (4.3.5) I have had nothing but grief!!
I updated it a week ago now and every morning since then I have woken up to my phone saying there is no sim inserted! The phone is plugged in overnight to charge and it has done this every night without fail ever since I loaded this stupid update!!
Also at least once and hour during the day if the phone is left alone for a bit the dreaded 'No Service' message appears! I then have to turn on the Airplane Mode and leave it for a few seconds and then back off and the signal slowly loads back up! Just to add to the frustration the phone is now a week over the free support warranty period (strange coincidence) so I cannot get any help from Apple unless I pay for it!
Has anyone else experienced a similar problem since the iOS 4.3.5 software was released?

same here!!

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