apologies if this has been answered, but did a few searches and couldnt find anything.

i had 2.21 and 2.3 baseband and was able to downgrade basebands and unlock w yellowsn0w. planning to now sell my iphone 3g and need to delete my data. not concerned w most secure wipe ever, but concerned w losing the unlock or having to go through the whole process again. is there an easy way to delete the data on the phone w/o losing the unlock?

thanks in advance

Erase all contents and settings then download yellowsn0w again should work, I believe.