I have a 6620 that I purchased from eBay and I jumped the gun a little and didn't realize it wasn't unlocked until I purchased it.
I have the tried some codes from GSM Software but wasn't sure if the I should say it was AT&T or Cingular. I also Nokia Calculator 3.10 and have tried several codes.
I have heard there is a limit to the number of codes that can be tried, but I thought if there was there would be some indication that I had reached that limit. There is none.
For wasting your attempt by giving wrong codes,Better get the mobile unlock code for your mobile from the website unlocking4free.com Select the model in the website and get the code for free of cost.
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