Yah, had the same issue with Bittrex and one other app when I did my last phone switch. Even though I had meticulously recorded the hash and followed instructions to migrate to my new phone, it would not let me install a new authenticator on the new phone and utilize. It literally took me a month and a half and at least 6 support calls/emails, identify validation checks, etc. to get them to remove the MFA from my account, let me log in and then reset it. Very frustrating when they could simply do a text or other MFA method as backup to the authenticator app. I moved everything out of that account as soon as I had access restored so I would never have to go through that again.
I'm holding on to my last Pixel phone until they hopefully come out with a reliable folding model later this year or next. I'm fascinated by the ability to use as phone and unfold to tablet size for reading, videos, etc. Last set of attempts seemed lame by most vendors, but this round they should have the bugs out.
It was so annoying. I wanted to break something...but wouldn't find something I wouldn't miss, so struggled through. 🤣
I looked at the Samsung folding models yesterday, seem pretty good but I wasn't sure about it, didn't feel totally confident so went with the S22 Ultra. I think it'll work for a while. (It even makes phone calls) 🤪