[GUIDE][PARTIAL] Unlock Additional LTE bands on Chinese & US variants of OnePlus 3

[koko21341]

Rom upgrade

I'm using RR rom - 7.1.1
If I enable LTE, what will happen if I upgrade the rom (without installing new firmware)?
Is there a shortcut for this fix after I applied it once?
(I didn't try yet)

 

[aurfawce]

I'm using RR rom - 7.1.1
If I enable LTE, what will happen if I upgrade the rom (without installing new firmware)?
Is there a shortcut for this fix after I applied it once?
(I didn't try yet)

It should stick, nonetheless make a full backup via twrp and efs in case it does. Each person may experience different results

 

[moti2408]

You can download it from following link:
https://forum.xda-developers.com/showpost.php?p=72044048&postcount=1276
This patch is also work properly on FreedomOS 2.8.
It's time to level up.
We not only can unlock LTE bands, but also can unlock LTE CA combination now.

ok so I tried and it did not work, i can see band 3 in guru but i get reception of "h+" and in guru if i select only lte band 3 it's show no signal
i tried NV item#1878 value to 232 and 231 and still get same result
my imei is ok , But I noticed that after i flash the rmt patch 4.1.x I did not get a message about a different NV.
any idea?
again i have OP3 Us with oxygen os 4.1.3
thanks

 

[snowwolf725]

Are you using "EUNOIMEINEW.qcn + "fbrx_eu.qcn ???
Or the new files?

Yes, it's a new file or a new method for modifying LTE CA combination.
OnePlus 3/3T doesn't support B7+B8 by default.
However, I found the LTE CA configuration file is stored in NV item#28874.
Ref : https://forum.xda-developers.com/showpost.php?p=72015316&postcount=1268
If you give wrong LTE CA rules, you will let your modem into crash loop.
In addition, you will find that you can't connect your mobile to QPST.
To solve this problem, you need restore system partition in TWRP.
(If you have the rmt_storage backup, you can only restore the rmt_storage with un-patched version.)

Hong Kong/ Europe Model (A3003)
FDD-LTE/ 4G: Bands 1/3/5/7/8/20
TDD-LTE/ 4G: Bands 38/40
LTE CA / 4G+:
B3+B7, B3+B8, B3+B20, B7+B20, B3+B3, B3C, B7+B7, B7C, B40C

China Model (A3010)
FDD-LTE/ 4G : Bands 1/3/5/7/8
TDD-LTE/ 4G: Bands 38/39/40/41
LTE CA/ 4G+:
B1+B3, B39+B41, B39C, B40C, B41+B41, B41C，B38C

American Model (A3000)
FDD-LTE: Bands 1/2/4/5/7/8/12/17/30
LTE CA/ 4G+:
B2+B12, B2+B17, B4+B7, B4+B17, B12+B30,B2+B2, B2C, B4+B4, B4+B12, B4+B5, B2+B5

I'm using RR rom - 7.1.1
If I enable LTE, what will happen if I upgrade the rom (without installing new firmware)?
Is there a shortcut for this fix after I applied it once?
(I didn't try yet)

If you upgrade your mobile OS, you need follow the instructions to re-unlock bands.
The shortcut is directly patch oem_dycnvbk and oem_stanvbk partitions in your mobile.
After you patch these partitions, you will not lost unlocked LTE bands no matter what you upgrade your OS.
However it's too difficult for novice, and it's very dangerous.

ok so I tried and it did not work, i can see band 3 in guru but i get reception of "h+" and in guru if i select only lte band 3 it's show no signal
i tried NV item#1878 value to 232 and 231 and still get same result
my imei is ok , But I noticed that after i flash the rmt patch 4.1.x I did not get a message about a different NV.
any idea?
again i have OP3 Us with oxygen os 4.1.3
thanks

Did you select "Clear forcings" in NSG?
You need select "Clear forcings" in NSG to clear old setting, after you modify NV items or EFS partition.
What files do you use? (EUNOIMEINEW.qcn + fbrx_eu.qcn or OP3TEU.qcn + fbrx_OP3TEU.qcn)
If it still not work, maybe B3 is not available in US model.

 

[moti2408]

Yes, it's a new file or a new method for modifying LTE CA combination.
OnePlus 3/3T doesn't support B7+B8 by default.
However, I found the LTE CA configuration file is stored in NV item#28874.
Ref : https://forum.xda-developers.com/showpost.php?p=72015316&postcount=1268
If you give wrong LTE CA rules, you will let your modem into crash loop.
In addition, you will find that you can't connect your mobile to QPST.
To solve this problem, you need restore system partition in TWRP.
(If you have the rmt_storage backup, you can only restore the rmt_storage with un-patched version.)

Hong Kong/ Europe Model (A3003)
FDD-LTE/ 4G: Bands 1/3/5/7/8/20
TDD-LTE/ 4G: Bands 38/40
LTE CA / 4G+:
B3+B7, B3+B8, B3+B20, B7+B20, B3+B3, B3C, B7+B7, B7C, B40C

China Model (A3010)
FDD-LTE/ 4G : Bands 1/3/5/7/8
TDD-LTE/ 4G: Bands 38/39/40/41
LTE CA/ 4G+:
B1+B3, B39+B41, B39C, B40C, B41+B41, B41C，B38C

American Model (A3000)
FDD-LTE: Bands 1/2/4/5/7/8/12/17/30
LTE CA/ 4G+:
B2+B12, B2+B17, B4+B7, B4+B17, B12+B30,B2+B2, B2C, B4+B4, B4+B12, B4+B5, B2+B5



If you upgrade your mobile OS, you need follow the instructions to re-unlock bands.
The shortcut is directly patch oem_dycnvbk and oem_stanvbk partitions in your mobile.
After you patch these partitions, you will not lost unlocked LTE bands no matter what you upgrade your OS.
However it's too difficult for novice, and it's very dangerous.



Did you select "Clear forcings" in NSG?
You need select "Clear forcings" in NSG to clear old setting, after you modify NV items or EFS partition.
What files do you use? (EUNOIMEINEW.qcn + fbrx_eu.qcn or OP3TEU.qcn + fbrx_OP3TEU.qcn)
If it still not work, maybe B3 is not available in US model.

i use EUNOIMEINEW.qcn + fbrx_eu.qcn and i did "Clear forcings" in NSG
and what do you mean by " maybe B3 is not available in US model" there is some friends here that managed to enable Band 3

 

[snowwolf725]

i use EUNOIMEINEW.qcn + fbrx_eu.qcn and i did "Clear forcings" in NSG
and what do you mean by " maybe B3 is not available in US model" there is some friends here that managed to enable Band 3

Sorry, my mistake.
In OP's post, he says "if you need B3 on your US, use CN QCN" and "If you need B3 on US Model, use 231 or 225".
So maybe you can try OP3CNCLEANOOS.qcn + fbrx_cn.qcn.

 

[Scorpion70]

Yes, it's a new file or a new method for modifying LTE CA combination.
OnePlus 3/3T doesn't support B7+B8 by default.
However, I found the LTE CA configuration file is stored in NV item#28874.
Ref : https://forum.xda-developers.com/showpost.php?p=72015316&postcount=1268
If you give wrong LTE CA rules, you will let your modem into crash loop.
In addition, you will find that you can't connect your mobile to QPST.
To solve this problem, you need restore system partition in TWRP.
(If you have the rmt_storage backup, you can only restore the rmt_storage with un-patched version.)

Hong Kong/ Europe Model (A3003)
FDD-LTE/ 4G: Bands 1/3/5/7/8/20
TDD-LTE/ 4G: Bands 38/40
LTE CA / 4G+:
B3+B7, B3+B8, B3+B20, B7+B20, B3+B3, B3C, B7+B7, B7C, B40C

China Model (A3010)
FDD-LTE/ 4G : Bands 1/3/5/7/8
TDD-LTE/ 4G: Bands 38/39/40/41
LTE CA/ 4G+:
B1+B3, B39+B41, B39C, B40C, B41+B41, B41C，B38C

American Model (A3000)
FDD-LTE: Bands 1/2/4/5/7/8/12/17/30
LTE CA/ 4G+:
B2+B12, B2+B17, B4+B7, B4+B17, B12+B30,B2+B2, B2C, B4+B4, B4+B12, B4+B5, B2+B5

I have china model(a3010). in my country combination of b3 & b7 works for LTE CA(4G+), therefore i should only combine them and i don't need unlock any bands.
I hope there is an easier method for this(?)

 

[elnenez]

Thanks for your work. Tested and working properly. I obtained LTE CA 3+7 in my area with an A3010 and OO 4.1.3.

UPDATE: After receiving or making a call, network signal is always lost and SIM is reseted.

UPDATE 2: This SIM power cycle doesn't happen if I uncheck B20 in NSG band locking.

UPDATE 3: No need to uncheck B20 if using 1+3 EU qnc files instead of 1+3T EU qnc files.

UPDATE 4: Tested band 20 in A3010 flashed with 1+3EU files without success. No signal detected in this band

UPDATE 5: Tested band 20 with 1+3T EU files. Same result, no signal detected in this band.

 

[snowwolf725]

I have china model(a3010). in my country combination of b3 & b7 works for LTE CA(4G+), therefore i should only combine them and i don't need unlock any bands.
I hope there is an easier method for this(?)

To unlock LTE CA is easier than unlock bands on OnePlus 3/3T.
If you only need B3+B7, you can flash Unlock_LTE_CA_B3B7B8.qcn via QPST.
This qcn file will enable B3+B7, B3+B8, B7+B8 on your OnePlus 3/3T.

1. Backup your EFS and modem in TWRP
2. Enable Qualcomm diagnostic mode
3. Enable airplane mode
4. Using QPST to backup your QCN file
5. Flash rmt storage patch for 4.1.x
6. Using QPST to flash Unlock_LTE_CA_B3B7B8.qcn
7. Disable airplane mode
8. Run Network Signal Guru, choose "Clear Forcing" from the menu on upper right

 

[allluke]

To unlock LTE CA is easier than unlock bands on OnePlus 3/3T.
If you only need B3+B7, you can flash Unlock_LTE_CA_B3B7B8.qcn via QPST.
This qcn file will enable B3+B7, B3+B8, B7+B8 on your OnePlus 3/3T.

1. Backup your EFS and modem in TWRP
2. Enable Qualcomm diagnostic mode
3. Enable airplane mode
4. Using QPST to backup your QCN file
5. Flash rmt storage patch for 4.1.x
6. Using QPST to flash Unlock_LTE_CA_B3B7B8.qcn
7. Disable airplane mode
8. Run Network Signal Guru, choose "Clear Forcing" from the menu on upper right

Will it also unlock B3 as a side affect if it isn't already unlocked??

 

[Scorpion70]

To unlock LTE CA is easier than unlock bands on OnePlus 3/3T.
If you only need B3+B7, you can flash Unlock_LTE_CA_B3B7B8.qcn via QPST.
This qcn file will enable B3+B7, B3+B8, B7+B8 on your OnePlus 3/3T.

1. Backup your EFS and modem in TWRP
2. Enable Qualcomm diagnostic mode
3. Enable airplane mode
4. Using QPST to backup your QCN file
5. Flash rmt storage patch for 4.1.x
6. Using QPST to flash Unlock_LTE_CA_B3B7B8.qcn
7. Disable airplane mode
8. Run Network Signal Guru, choose "Clear Forcing" from the menu on upper right

Amazing! Thanks dear Snowwolf:fingers-crossed::highfive:

 

[DW_T]

To unlock LTE CA is easier than unlock bands on OnePlus 3/3T.
If you only need B3+B7, you can flash Unlock_LTE_CA_B3B7B8.qcn via QPST.
This qcn file will enable B3+B7, B3+B8, B7+B8 on your OnePlus 3/3T.

1. Backup your EFS and modem in TWRP
2. Enable Qualcomm diagnostic mode
3. Enable airplane mode
4. Using QPST to backup your QCN file
5. Flash rmt storage patch for 4.1.x
6. Using QPST to flash Unlock_LTE_CA_B3B7B8.qcn
7. Disable airplane mode
8. Run Network Signal Guru, choose "Clear Forcing" from the menu on upper right

This file have all the required CA in A3003 including B7+B8 which is not available in A3003 right?

 

[jrome123]

Can someone get B4 unlock 3Tcn or do somebody went buy this phone for $300 so tired tryed to unlocked no LTE

Sent from my LG-D851 using XDA-Developers Legacy app

 

[BTslo]

Can I unlock band 20 on US 3T? (A3000)

 

[theking_smen]

To unlock LTE CA is easier than unlock bands on OnePlus 3/3T.
If you only need B3+B7, you can flash Unlock_LTE_CA_B3B7B8.qcn via QPST.
This qcn file will enable B3+B7, B3+B8, B7+B8 on your OnePlus 3/3T.

1. Backup your EFS and modem in TWRP
2. Enable Qualcomm diagnostic mode
3. Enable airplane mode
4. Using QPST to backup your QCN file
5. Flash rmt storage patch for 4.1.x
6. Using QPST to flash Unlock_LTE_CA_B3B7B8.qcn
7. Disable airplane mode
8. Run Network Signal Guru, choose "Clear Forcing" from the menu on upper right

Thanks got mine A3010 to reach 4g+ on my Singapore singtel network... download speeds reach 100 Mbps..

 

[Prashanthme]

Thanks got mine A3010 to reach 4g+ on my Singapore singtel network... download speeds reach 100 Mbps..

So after changing band, can u install custom rom like rr?

 

[koko21341]

Directions for one plus 3 US model

I want to unlock one plus 3 US model.
I want LTE for band 1,3,5.
Most of the recent posts are for 3t.
Can someone please post clear directions of what to do (with the required links)?

thanks

 

[theking_smen]

So after changing band, can u install custom rom like rr?

I guess you will have to install your custom rom first... Then change your band...

 

[Prashanthme]

I guess you will have to install your custom rom first... Then change your band...

Ok will try...

 

[otonieru]

I have updated the main post to include @SnowWolf75 new patch and additional OP3T files

the rest of procedure will remain the same.