Hello everyone!
I have a Mi 9 from China, which is running Xiaomi.eu ROM 20.1.21 and is rooted with Magisk 20.3 and I have TWRP 3.3.1-46 as custom recovery.
My device does not have Band 20 unlocked. My carrier uses Band 20 for LTE, so I would like to have this band on my device as well.
My girlfriend has a Mi 9 from the Netherlands (where we live), which does have Band 20, so it should be possible to unlock band 20 on my phone, since the Snapdragon 855 does support this band.
I read somewhere on this forum (here) that the bands are locked somewhere deep in the system and that it is possible to unlock them by changing values in the NVRAM.
There is a very big chance I'm going to need a custom kernel to be able to write to the NVRAM, because apparantly Qualcomm added some anti temper software to prevent unlocking extra bands (and other features).
I also read somewhere (here) that every OTA update from Xiaomi.eu ROMS installs a new original kernel.
With this information, I have the following questions:
- Do I need a custom kernel to edit the NVRAM to unlock band 20?
- If I do need a custom kernel, which one whould you advise?
- If I have a custom kernel, can I still update my Xiaomi.eu ROM through OTA?
- If I can update through OTA, will the changed settings to the NVRAM remain there, or will the newly installed kernel also reset the values (and I will lose Band 20)?
I would really appreciate your help!
Related
I by mistake through short cut master lite app changed the radio band to United States.... since then I am not able to get network on one of my sim....have tried swapping sim ....even downgraded the firmware ....but still the band is stuck at USA......ONE Plus 3T is currently on oxygen OS Nougat beta version.....Someone in this forum suggested to flash modem zip .....can anyone provide modem zip and the procedure to flash it which can reset my radio band settings ...build no is ONEPLUS A3003_28_161229.....The phone is ONE PLUS 3T 64 GB
saurabhcfp said:
I by mistake through short cut master lite app changed the radio band to United States.... since then I am not able to get network on one of my sim....have tried swapping sim ....even downgraded the firmware ....but still the band is stuck at USA......ONE Plus 3T is currently on oxygen OS Nougat beta version.....Someone in this forum suggested to flash modem zip .....can anyone provide modem zip and the procedure to flash it which can reset my radio band settings ...build no is ONEPLUS A3003_28_161229.....The phone is ONE PLUS 3T 64 GB
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You can find them all here
https://forum.xda-developers.com/showthread.php?t=3509015
Sent from Funk Tuned 3T
Hi everyone, I recently switched from AT&T to Sprint. Wondering if I can flash the Sprint radio to enable the cdma, or should I crossflash the unlocked version/Sprint version from in order to get the full bands compatible. Thanks a lot.....:highfive:
PS my V40 is running latest android 10.
I have a Sprint V405UA, bootloader unlocked via 9008 mode running Havoc OS 3.5. I experience no better than 1X or a single bar of 3G on Havoc OS, but I do have the stock Pie ROM/partitions in slot A (no Sprint Android 10 yet to my knowledge). On stock, service works like a charm with full LTE bands. I'm not too heavily experienced with the partition layout or radios of this phone. If someone were able to tell me where I can dump the radio to for a flashable ZIP, or if there is a system app that Sprint has installed to enable LTE bands and Wi-Fi/VoLTE that I can retrieve with root, I am happy to provide.
Hi i was wondering what region/stock Android 10 rom version would be best to flash prior to the lineage or similar ones for use on at&t? The LG v40 i have is v405ua but it doesn't look like there's a official 10 stock rom for it.. i had cross flashed an at&t pie stock rom as it kept dropping calls I assume it was modem firmware. And yes bootloader is unlocked.
Well, a few things... 1st, if you want to use at&t as your carrier, then u have to have an at&t device / rom to be able to use vowifi (and I think volte). So, if you need those, then you have only one option, flash an at&t rom to your at&t device (they can verify if it's at&t by the imei number, so no, you can't take a sprint one and flash at&t rom).
2nd, lineage doesn't support vowifi nor volte. So for us in the states, this is a problem as the 3G netwroks disappear, you'll be unable to make a call without volte.
3rd, any stock 10 would work with (latest) lineage. Lineage doesn't need a 'specific' one to work, it just needs that OS level. There are older lineage builds that work with 9. Maybe check one of those to see if it meets your needs before doing more?
cheers
Hi all, I just got a SM-G973U1 (unlocked snapdragon) to replace my old S7 international version that doesn't have working VoLTE. AT&T is shutting down 3G in February, so I need to set up this new phone so that it works in LTE only mode.
I'd like to use TWRP recovery and Magisk root, but I doubt any ported ROMs will work because of Samsung's proprietary drivers for VoLTE/HD voice. What's the best stock-based ROM available for this device? Alternatively, where can I find detailed instructions for installing these items myself and removing Knox and other safeguards from the existing stock firmware (possibly using adb shell)?
If necessary, I'm willing to use the ATT CSC code on this phone. This is not the current CSC on this device.
I'm returning the phone because I haven't found a way to unlock the bootloader.
I haven't been in the phone flashing game for a while. I'm not seeing many topics regarding my Xperia 1ii (Docomo version) Because there are locked bootloaders nowadays or something? Would like to flash a global ROM on it but I don't see official TWRP support for it either.
Not receiving the Android 12 updates either even though I should by now. I'm in South East Asia, is my location causing the update not to get pushed over?
using Japaneses model doesn't mean it always locked, i have AU version of xz1 that unlocked and have xz3 global that locked.. but yeah. most Japaneses model are locked. if you are locked. or only want to flash global. there no need to unlock it. or use twrp or other recovery. in fact flashing official rom doesn't even use recovery mode at all. it use download mode(if im not mistaking it)and with tool like xperia Firmware downloader and newflasher. you can flash any official rom to your docomo one.
BUT. REMEMBER!!
1.Japaneses smartphone use special nfc hardware that different than global. your nfc will go bye bye if you flash global rom in there.
2.careful. do research before flashing. xperia devices is not as easy as samsung or xiaomi. 1 mistake can be fatal. if lucky it only bootloop. but if unluck, from software/feature glitch, locked(sim/ubl) or just refuse to detected(A.k.a permanent dead)
i been use xperia devices since z4 era. and trust me it more scare to change official rom on locked devices than swap custom rom or install mod like magisk,etc on unlocked devices even manually modified system file are better than change to global on locked devices,