Hello, I'm getting desperate with unlocking - I purchased a used ATT Nokia Lumia 1520 assuming that I could unlock it using various services (I'm on tmobile). I've tried two on eBay, and both couldn't do it. Then I tried CellUnlocker, and after almost a month of making me wait, they said they couldn't do it either. So if there's anyone with USA ATT, I'm willing to send $20 to your Paypal account if you could request an unlock code using the official ATT unlock request (search on "ATT unlock request" to get the official link, if you don't already know, you get 4 unlock requests a year).
I can send you $5 after seeing a screenshot of the submittal, and another $15 upon receiving and verifying the unlock code. Please PM <email removed by mod per rules> and I can send you the IMEI privately.
Thanks,
Woody