How Can I Bypass iCloud Activation Lock on My iPhone 12 Pro?

Sorry to hear you're dealing with this! If you're unable to get the original owner involved, Apple might be your best bet, but again, it's crucial to have that original purchase receipt. Trying other software options can be hit or miss, but it’s worth exploring community forums for new tools or methods that might help resolve activation issues.

Looks like you're in a tough spot. Unfortunately, the only way to get past the iCloud activation lock is if the original owner removes it. There's a chance that the phone could be stolen as well, which is something to keep in mind. Always check that the phone is functional and can be set up properly before buying, especially if it’s through a platform like eBay. If you feel cheated, consider looking into returning it based on the description, especially if it wasn't explicitly stated to be locked like this.

You can get assistance from an Apple store to unlock it, but you'll need the original bill of sale. Without that, they won’t assist you. If you don’t have the bill since you bought it second-hand, I recommend trying to reach out to the seller for help or maybe even consider seeking other options or recommendations. Some people have found tools like 4uKey useful, but it sounds like you’ve already tried that without luck.