Really? So is that why the OP's non-US model S24 Ultra is working on AT&Ts network with his AT&T SIM?
As i told you in a previous thread; Reread what I said. You really are fatiguing to deal with.
Edit, matter of fact let me me say it again and more plainly with some additional info.
I referenced
@joeldf who said: ATT has a whiteliist; go look it up. I elaborated that point was correct and they were strict about it. If a phone isn't whitelisted, they can't/won't do anything about it.
Furthermore
again, they (ATT) like Google do sweeps of blocks of customer devices. Some slip by, some stop working. A AT&T SIM that was activated on a whitelisted phone will likely "work" in a non-approved phone at least initially if you put it in, a inactive SIM will probably not.
You may be fine, you may not. Why risk you're phone going limp when you need it most? Verizon was similar to ATT but allowed more devices even if not approved. T-Mobile does not care. You put the SIM in and it will work to the extent of the device compatibility to the network.
Except for certain apps not installing because of the firmware's CSC, it seems to be working fine.
Oh does it? Did you personally use and check the phone? Why are you making statements on behalf of the OP? All respect to the OP but they didn't even know to check the model, do you think they know how to check and make sure all required features work?
I know they don't. A non-US phone will NEVER get an OTA, period. Even if you butcher it with a US CSC which others have done and advised against, it still doesn't change the phones region prefix. The first three letters will always stay those letters no matter what's flashed over it.
And to further emphasize how bad of an idea flashing a CSC (no matter how comfortable I am doing it), inexperienced users shouldn't be touching ODIN unless they are willing to deal with a soft or hardbrick which is very easy to do if you don't know what you're doing.
That's all I've got to say, I'm just going to write a greasemonkey script to ignore your posts on here
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OP, sell the phone and don't play thr game of finding out how well it does or doesn't work. The longer the phones uptime reads in the 'About' section, thr lower the value drops, it's like driving a car off the lot and adding miles.
You post it saying you bought it sealed, opened it and didn't realize it was an international model and has barely/not at all been used (be honest) and that's why you're getting rid of it.
Take that money and don't buy phones from Craigslist.