That’s correct
Initially the Chinese manufacturer said that they will release only a European non-kosher version Little did they know that we in the US was able to flash US bands on a European version phone
The company that invested a ton of money in the f30 were extremely upset as you can imagine the whole kashres of the phone was now out the window because now there was many non-kosher versions of the same looking phone out there
Hence also the newest QIN f25 phone is now impossible to have US bands because the company behind the f30 is actually working with them currently to make a US Version of the phone kosher only
Officially the release of the “kosher” f25 was supposed to be released already but it got delayed a lot because of the price of processors and chips went up tremendously because of the lack of them