You cannot do anything technically to get past it. Your only method is to get back to the seller. If they have disappeared, then perhaps you might want to entertain the possibility that you have been sold a stolen iPhone.In this instance, then rather than have a very expensive paperweight, you might want to report it to the Police.
There is a slim chance that it has been reported as stolen, and they may be able to reunite it with it's true owner, in which case there is also a chance that they may reward you in some way to make up for your loss, or (perfect scenario) they will have already replaced it on insurance, and will simply unlock it for you and let you keep it.To confirm, there is only a human solution to this problem, by getting the owner of the registered Apple ID to unlock it. This is a dead end. There are a number of ways to actually boot into the device but for the most part, it will always remain inoperable. In the link you provided, cellular calls are not possible.
The steps shown below can be used to bypass iOS9 activation lock permanently. Head to Applications. Tap on Crash. Select language and country. Select WiFi Settings. Tap on the Globe on the keyboard. Aug 11, 2018 How to Bypass iCloud Activation Lock on iPhone for Free with DNS method. Step 5: Tap “Back ” in the top left screen, then choose your network and insert your wifi password. Hence your iPhone will jump to the next page, don’t let it, and hit “Back” Step 6: The iCloud Bypass screen will pop up. Step 7: Scroll down.
Moreover, once Apple's servers pick it up on the grid, it will get bricked again, cellular calls aside. Once the actual device is blacklisted on Apple's servers, they will chase it to the ends of the earth making sure it will stay lock or remain inoperable. There is absolutely no true way of bypassing AL.– user10355 Mar 4 '15 at 4:47.