Just when you thought we’d forgotten about the whole iPhone antenna issue, an article on Gizmodo shows us how to check our iPhone reception.

This trick will work for any iPhone rocking the new iOS 4.1 firmware.

Dial *3001#12345#* from your iPhone and watch the signal bars being replaced by a number. The lower the number, the better the signal. Hit the Home button to see the bars again.

If you have updated your iPhone to iOS 4.1, try this trick and let us know how your signal is.