You wont get OTA ever if you have different CSC than what the ROM is based on, either you reset and keep the stock TMB one, or flash the full GCF fw ig.
Question S22u snapdragon US unclocked very slow 4g speed(10Mbps) in europe.
- Thread starter noelbisha45
- Start date
Yes. no ota but you can odin update your phone and backup date. Because GCF mode can support 5G in all countries without operator restrictions
According to this you can change your CSC and still receive OTA's? https://forum.xda-developers.com/t/s22-ultra-csc-change.4461401/post-87271151
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our problem doesnt seem to be not supporting the bands, instead its related to carrier aggregation support..
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2Hi after few days of Changing the Firmware from U1 to U i can really see improvements having Speeds with 5G upto 600Mbits or More Sometimes with German Provider Deutsche Telekom thanks a lot again to AmazDev11
Yh i have 5G continuously with very high speeds not the U1 Speed anymore (20-50mbits)1
The key point is using an ATT sim. If you flash the U Firmware with an ATT sim in it, your phone becomes ATT branded (you have carrier's splash screen, bloatware etc.) and you unlock all the bands. Then even if you use a sim from another carrier, it will still be configured as you're using an ATT sim until you factory reset the smartphone so you'll always have all the bands unlocked. In the U1 firmware instead, every time you put a sim in it, the phone will ask you to reboot and optimise carrier settings but if you're not using a USA sim you'll just get some useless default settings with only a few bands available which are only enough to get the standard old LTE (not even LTE+).
Simply flashing the U Firmware over the U1 doesn't change anything. Unlikely that's how Samsung firmware works.
If you can't get a USA sim you can't use this trick so I'm sorry but you'll have these low speeds forever.1If you need full call features purchase a device from the service provider in the region you'll be residing. Unlocked devices have a long history of compatibility issues. Don't assume the 5G Band(s) available in your device's network configuration which match your service provider's 5G network options are compatible. Unless the anchor is in sync it won't connect. Changes to your CSC typically create conflicts since they're designed for their specific software configuration. Do your homework before you purchase any device, trying to patch things together is a gamble at best. Samsung is to blame to a large degree. Way too many variants and multiple SOC's is a recipe for disaster!
