Please check Post #1840
@qhsusb_bulk has did a great work and provided patched static nvbk for OP3T running on Pie (9.0.6)
Its working like charm
su setprop sys.usb.config diag
Myself, & @baskaflyfer of course - CN MODEL - B5 B8 UNLOCKED - B3+B7 CA UNLOCKED
@allluke - US MODEL - B3 UNLOCKED post #640
@dapsyra - US MODEL - B3 UNLOCKED post #558
After following the guide, I was able to unlock band 3 in my US model OnePlus3 A3000. See attached images
I did all the steps. My IMEI is intact.
It takes some time for the signal to show up in Network Guru, so be patient.
In Network Guru->Band Locking->LTE, uncheck all the other LTE bands leaving only band 3 checked
Then go to RAT Locking and select LTE. Wait for the signal to show up.
If Network Guru goes to WCDMA, repeat last step.
@band3pls - US MODEL - B3 UNLOCKED post #846
I can confirm my LTE band 3 is working after flashing the new QCN, BUT after flashing the QCN you must reboot and then open QXDM and write 225 to NV item 1878, or else it won't work.
Here are my steps:
First I flashed this: (other/older QCN files posted by @otonieru will probably work too)
Then I rebooted, and flashed this: (Baskaflyfer's QCN)
Then I rebooted again, and flashed this: (Baskflyfer's fbrx file)
Then I rebooted, wrote 225 in NV item 1878 in QXDM, and finally got LTE signal on band 3 working here in Pakistan on my A3000US.
@kaiserreich - US MODEL - B3 UNLOCKED post #921
I managed to get it to work.
Now I have EU bands on my A3000CN
1. flash rmt_storage via twrp. (first page)
2. restore europe qcn. (first page)
3.restore A3003_eu from post #334 (third step)
4.run qxdm -> nv browser -> find id 1878 and change it to 237 (write).
5.reboot your phone.
2. Now your devices wil either detected as unknown device (or Qualcomm Diag Port/USB Modem if you already have the diag driver) on Device Manager