Replaced iphone 3gs rear panel, getting no sim displayed now

[mrblue]

I replaced my rear panel yesterday, seemed to go great with the help of the very informative on ifixit.

Im now getting no sim displayed.

Everything working fine apart from phone. Can anyone pinpoint the problem and solution.

[gizmo.1484]

It sounds like it's the sim tray connector that's not touching.. Have a look at this video it will show you how to sort it..[ame=http://www.youtube.com/watch?v=tdE6zGTsFTI]YouTube - ‪iPhone No Sim Card Installed 3G and 3GS Problem‬‏[/ame]
If the two connectors are touching then check the sim carrier to see if any of the six connectors are missing. If they are then it means replacing it or if you find the connection then try to fix...