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3So to use this, you will need to be bootloader unlocked, magisk perma rooted, and twrp installed, DM Verity Disabled this is a must!!(its always good to make a nandroid before making any changes on your phone). What this will do is more or less provision your Lg G8 to your Desired Carrier, it will also let you change your apns, so you have volte working and also the data indicator will change to match the carrier. WIfi calling i have not been able to get working, i personally do not use it. .
*Copy the files manually, it seems flashing them directly is causing unforeseen issues*
Download
Sprint
People cant have nice things =/. look for me on the blue old app
T-Mobile
People cant have nice things =/. look for me on the blue old app
Credits:
j4nn for the amazing temp root that allows us to do this
vl48 for BL unlock this guy is so awesome
inherent for finding j4nn and getting temp root rolling
Mr. zhu for bringing us TWRP.2
Thanks for pointing me in the right direction! I now have VoLTE and Wifi Calling working on my LMG820QM (on T-mobile).
I have the BPT variant of the LMG820QM, for which VoLTE and Wifi Calling does not work. After bootloader unlocking and rooting, I tried the above VolteFix-v1 but wanted Wifi Calling. Forcing the option to appear via a profile in Universal Enabler in the hidden menu* did not work and instead caused LG IMS to continuously crash.
*For those interested in the hidden menu, first create an empty folder named "enable_ue" in internal storage. Then go to the dialer and type *#546368#*820#. In Field Test > Universal Enabler you can "Create New Config" and manually enable VoLTE, ViLTE, VoWIFI, and ViWIFI. However, even though these options became enabled in *#*#4636#*#* they didn't seem to actually work.
Next, I tried to crossflash partitions from the US Open kdz but was unable to due to a size mismatch of the OP partition (among other problems).
Finally, since I had already extracted the OP partition from the US Open kdz (G820QM20f_00_NAO_US_OP_0402.kdz), I extracted files that looked relevant and copied them over using a root browser into /product/OP. After setting permissions and restarting, I now have working VoLTE and Wifi Calling!
The files are cust.prop [update: apparently not needed; my existing one worked just fine], all the files in config, and a few folders in priv-app [update: these are the apps for Wifi Calling!] not present in my phone's kdz (not sure which ones if any of these apks are actually needed but since it works I'm not going to experiment more). See attached for details.
Note: Since these files are from the US Open kdz, it will likely only work for US carriers. But the process can be repeated for other regions with the right kdz.
UPDATE: Replaced the attachment, had the wrong files in Config.
** Noticed that upon factory resetting the wrong default APNs are inserted. Had to factory reset on original files, have APNs setup correctly, then copy the attached files (did not copy over cust.prop this time and still worked).1
Yes it will work. I'm surprised there's a carrier that the supposedly open Amazon variant doesn't work with.
First, you should get LGUP setup and and download the KDZ for your phone. Make sure you know how to put your phone into download mode and then restore everything back to stock with the LGUP tool. Get this fallback setup and working first before you do anything so if you're ever stuck in a bootloop you can always go back to stock. Search the web for this.
Next, follow the thread for the firehose method for bootloader unlock and magisk root.
Then, follow the readme in that twrpG8.zip linked earlier. Backup everything in TWRP.
Lastly, setup your phone with the correct working APNs. Now you can copy the files I linked earlier. VoLTE and Wifi Calling should now work.
