Any chance to enable all LTE frequency supported by MSM8960?

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Loader009

Senior Member
Jul 6, 2012
711
198
You might be right, but:
I am able to see carriers with "LTE only", which indicates me, that the phone is receiving "something" (maybe CDMA/GSM on the LTE frequency).
Because I was able to see "all four" (in my country) carriers, I am sure it wasn't 800 MHz. (At the time of testing some carriers didn't use that frequency.)
When I tried to "login" into my carrier I got an error notification. (Even a true LTE enabled SIM didn't change anything.)

So I guess two things:
- The into the phone flashed ESN was used to login.
- The frequency is not the valid LTE frequency for my country.

It might be both or one of them. So I think that only one frequency is supported and we are not able to use the SIM-card for LTE connections.
 

enigma9o7

Senior Member
Jun 26, 2014
218
34
San Jose
F(x)tec Pro1-X
I would like to use mine on AT&T LTE in US, so I'm wondering about this too. When searching, I found this article telegeography.com/products/commsupdate/articles/2013/11/11/us-round-up-att-refarms-pcs-spectrum-for-lte-in-nyc-leap-subs-plummet-ntelos-lte-launch-on-track that sounds AT&T might start using 1900MHz for LTE - does that mean it might just start working on its own when they implement this? Or does the band matter cuz I also found something that said AT&T's 1900MHz is band 2 but Sprints 1900MHz is band 25. I really dunno what I'm talking about here, this is just based on piecing together some search results, but I bet someone here understands and maybe could explain it for me...

If not... if there is a PAM IC for 1900MHz, maybe there's a pin compatible one for other freqs (i.e. 1700MHz) that could be swapped? I couldn't find any break-down or list of ICs used in this phone when I web searched... I'm wondering if maybe it's something from Avago or maybe that's just in samsung/apple phones. I guess the antenna is probably optimized for 1900MHz, but it might still work, just need strong signal...
 

gridmuncher

Member
Mar 13, 2011
31
2
I have the xt905 which comes with LTE freq 1800 and 2600 enabled. I really wanted to also enable the 800 band as I am based in the UK. I successfully flashed the modem and fsg from a retail ROM of the XT925 and 4G still works on my phone. Not sure however how to test which bands are working though. Thought this might interest anyone with a moto msm8960 phone.

Battery life seems worse however since flashing this baseband. VANQUISH......01P
 

CornholioGSM

Senior Member
Apr 13, 2005
760
302
Prague
i will post am monday something like picture datasheed of xt897.
...here is no amp for lte for use on 800 or 2600 :(
maybe amps can be changed....BUT....i am not sure if is photon able to use it
 

stargo

Inactive Recognized Developer
Jan 7, 2011
538
1,718
Fürth
I have tried to enable the 800, 1800 and 2600 MHz LTE-frequencies by modifying NV-item 6828 and changing/deleting /nv/item_files/modem/mmode/lte_bandpref in EFS. The result is sadly always the same for each of the frequencies: The modem crashes when it tries to switch to one of the LTE frequencies and produces the following error message:

Code:
Error in file rflte_msm.c, line 482

As we don't have the source for the modem-firmware, we can't fix that...

So it seems we are out of luck regarding additional LTE frequencies on our phones, as no modem from other similar phones will work correctly for us. I was too tired yesterday to check if older modems work, but I wouldn't put much hope into it.

EDIT: Same problem with modem from 4.0.4-7.7.1Q-6_SPR-125_ASA-10-11 :(

Regards,
Michael
 
Last edited:

CornholioGSM

Senior Member
Apr 13, 2005
760
302
Prague
deskafbd62.jpg


RTR8600 supported bands :
http://images.anandtech.com/doci/6541/IAR Summit Nov 2012_Serge_Jim_Page_20.png
 
Last edited:

enigma9o7

Senior Member
Jun 26, 2014
218
34
San Jose
F(x)tec Pro1-X
Found the PAM datasheet, attached FYI.

http://www.avagotech.com/pages/en/rf_microwave/amplifiers/linear_power/multiband_multimode/ said:
Multi-mode Multi-band Power Amplifiers

Avago Technologies multi-mode, multi-band power amplifiers support different operating modes (CDMA, UMTS, LTE and GSM/EDGE) and multiple frequency bands, and offer premium performance in a very small form factor.

ACPM-7081 - Quad-Band GSM/EDGE and Dual-Band UMTS (B1/B8)
• Quad Band GSM/EDGE (GSM850/900, DCS1800/PCS1900)
• UMTS Dual-Band (Band1 UMTS & CDMA BC6 and Band8 UMTS & LTE)
• Small size (7.5x5mm)

ACPM-7051 – Quad-Band GSM/EDGE and Dual-Band UMTS (B1/B5)
• Quad Band GSM/EDGE (GSM850/900, DCS1800/PCS1900)
• UMTS Dual-Band (Band1 – UMTS & LTE & CDMA BC6 and Band5 UMTS & LTE & CDMA BC0)
• Small size (7.5x5mm)


ACPM-7251 – Quad-Band GSM/EDGE and Dual-Band UMTS (B1/B5)
• Quad Band GSM/EDGE (GSM850/900, DCS1800/PCS1900)
• UMTS Dual-Band (Band1 – UMTS & LTE and Band5 UMTS & LTE)
• Small size (7.5x5mm)
 

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stargo

Inactive Recognized Developer
Jan 7, 2011
538
1,718
Fürth
Found the PAM datasheet, attached FYI.

So if I see this correctly, the ACPM-7051 is used for GSM 850, 900, 1800 and 1900 and UMTS 2100 (band 1) and 850 (band 5), the ACPM-5002 is used for CDMA BC1 and UMTS/LTE 1900 (band 2/25) and the ACPM-5005 is used for CDMA BC0/BC10 (and probably but unlikely for UMTS 850 (band 5)).

The default modem-config (nv 1877) enables all supported GSM and UMTS-bands but misses CDMA BC6 (ACPM-7051):
Code:
Bands enabled by 0x0000000004e84187:
00: CDMA-1: BC 0, A-System
01: CDMA-1: BC 0, B-System
02: CDMA-1: BC 1, all blocks
07: GSM: DCS 1800
08: GSM: Extended GSM (E-GSM)
14: CDMA-2: BC 10
19: GSM: GSM 850
21: GSM: PCS 1900
22: WCDMA: I   - Europe Japan China IMT 2100
23: WCDMA: II  - US PCS 1900
26: WCDMA: V   - US 850

Thanks @CornholioGSM for the picture and @enigma9o7 for the datasheet! :)

It's highly likely that LTE is only routed to the ACPM-5002 but if someone wants to experiment with getting the modem to use the other LTE-bands (supported by ACPM-7051, 2100MHz and 850MHz), that's how I tried it:

  • Start with a fresh modem-config: fastboot erase modemst1 && fastboot erase modemst2 (this resets all NV-items and restores files in EFS)
  • Use QPST to delete /nv/item_files/modem/mmode/lte_bandpref in EFS (or maybe modify it, seems as it is like nv-item 6828)
  • Use xt897-fix-usa (see this disabled part) or any other method to change nv-item 6828 to enable more bands

If you just do this, the modem will crash when trying to switch LTE bands, maybe additional changes to EFS/NV are needed...

And if you want to get a stable working modem back, just run fastboot erase modemst1 && fastboot erase modemst2 again.

Regards,
Michael
 
Last edited:

Azlun

Senior Member
May 9, 2013
340
217
Shenzhen


So if I see this correctly, the ACPM-7051 is used for GSM 850, 900, 1800 and 1900 and UMTS 2100 (band 1) and 850 (band 5), the ACPM-5002 is used for CDMA BC1 and UMTS/LTE 1900 (band 2/25) and the ACPM-5005 is used for CDMA BC0/BC10 (and probably but unlikely for UMTS 850 (band 5)).

The default modem-config (nv 1877) enables all supported GSM and UMTS-bands but misses CDMA BC6 (ACPM-7051):
Code:
Bands enabled by 0x0000000004e84187:
00: CDMA-1: BC 0, A-System
01: CDMA-1: BC 0, B-System
02: CDMA-1: BC 1, all blocks
07: GSM: DCS 1800
08: GSM: Extended GSM (E-GSM)
14: CDMA-2: BC 10
19: GSM: GSM 850
21: GSM: PCS 1900
22: WCDMA: I   - Europe Japan China IMT 2100
23: WCDMA: II  - US PCS 1900
26: WCDMA: V   - US 850

Thanks @CornholioGSM for the picture and @enigma9o7 for the datasheet! :)

It's highly likely that LTE is only routed to the ACPM-5002 but if someone wants to experiment with getting the modem to use the other LTE-bands (supported by ACPM-7051, 2100MHz and 850MHz), that's how I tried it:

  • Start with a fresh modem-config: fastboot erase modemst1 && fastboot erase modemst2 (this resets all NV-items and restores files in EFS)
  • Use QPST to delete /nv/item_files/modem/mmode/lte_bandpref in EFS (or maybe modify it, seems as it is like nv-item 6828)
  • Use xt897-fix-usa (see this disabled part) or any other method to change nv-item 6828 to enable more bands

If you just do this, the modem will crash when trying to switch LTE bands, maybe additional changes to EFS/NV are needed...

And if you want to get a stable working modem back, just run fastboot erase modemst1 && fastboot erase modemst2 again.

Regards,
Michael
really good post!
 

yahyazadeh58

Senior Member
Nov 29, 2015
61
2
Sony Xperia Z3v
Qualcomm MSM8960.

So if I see this correctly, the ACPM-7051 is used for GSM 850, 900, 1800 and 1900 and UMTS 2100 (band 1) and 850 (band 5), the ACPM-5002 is used for CDMA BC1 and UMTS/LTE 1900 (band 2/25) and the ACPM-5005 is used for CDMA BC0/BC10 (and probably but unlikely for UMTS 850 (band 5)).

The default modem-config (nv 1877) enables all supported GSM and UMTS-bands but misses CDMA BC6 (ACPM-7051):
Code:
Bands enabled by 0x0000000004e84187:
00: CDMA-1: BC 0, A-System
01: CDMA-1: BC 0, B-System
02: CDMA-1: BC 1, all blocks
07: GSM: DCS 1800
08: GSM: Extended GSM (E-GSM)
14: CDMA-2: BC 10
19: GSM: GSM 850
21: GSM: PCS 1900
22: WCDMA: I   - Europe Japan China IMT 2100
23: WCDMA: II  - US PCS 1900
26: WCDMA: V   - US 850

Thanks @CornholioGSM for the picture and @enigma9o7 for the datasheet! :)

It's highly likely that LTE is only routed to the ACPM-5002 but if someone wants to experiment with getting the modem to use the other LTE-bands (supported by ACPM-7051, 2100MHz and 850MHz), that's how I tried it:

  • Start with a fresh modem-config: fastboot erase modemst1 && fastboot erase modemst2 (this resets all NV-items and restores files in EFS)
  • Use QPST to delete /nv/item_files/modem/mmode/lte_bandpref in EFS (or maybe modify it, seems as it is like nv-item 6828)
  • Use xt897-fix-usa (see this disabled part) or any other method to change nv-item 6828 to enable more bands

If you just do this, the modem will crash when trying to switch LTE bands, maybe additional changes to EFS/NV are needed...

And if you want to get a stable working modem back, just run fastboot erase modemst1 && fastboot erase modemst2 again.

Regards,
Michael

I have a phone with Qualcomm MSM8960. chipset. is it possible to change its LTE band? at this moment it just support 700 mHz.
 

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  • 7
    Found the PAM datasheet, attached FYI.

    So if I see this correctly, the ACPM-7051 is used for GSM 850, 900, 1800 and 1900 and UMTS 2100 (band 1) and 850 (band 5), the ACPM-5002 is used for CDMA BC1 and UMTS/LTE 1900 (band 2/25) and the ACPM-5005 is used for CDMA BC0/BC10 (and probably but unlikely for UMTS 850 (band 5)).

    The default modem-config (nv 1877) enables all supported GSM and UMTS-bands but misses CDMA BC6 (ACPM-7051):
    Code:
    Bands enabled by 0x0000000004e84187:
    00: CDMA-1: BC 0, A-System
    01: CDMA-1: BC 0, B-System
    02: CDMA-1: BC 1, all blocks
    07: GSM: DCS 1800
    08: GSM: Extended GSM (E-GSM)
    14: CDMA-2: BC 10
    19: GSM: GSM 850
    21: GSM: PCS 1900
    22: WCDMA: I   - Europe Japan China IMT 2100
    23: WCDMA: II  - US PCS 1900
    26: WCDMA: V   - US 850

    Thanks @CornholioGSM for the picture and @enigma9o7 for the datasheet! :)

    It's highly likely that LTE is only routed to the ACPM-5002 but if someone wants to experiment with getting the modem to use the other LTE-bands (supported by ACPM-7051, 2100MHz and 850MHz), that's how I tried it:

    • Start with a fresh modem-config: fastboot erase modemst1 && fastboot erase modemst2 (this resets all NV-items and restores files in EFS)
    • Use QPST to delete /nv/item_files/modem/mmode/lte_bandpref in EFS (or maybe modify it, seems as it is like nv-item 6828)
    • Use xt897-fix-usa (see this disabled part) or any other method to change nv-item 6828 to enable more bands

    If you just do this, the modem will crash when trying to switch LTE bands, maybe additional changes to EFS/NV are needed...

    And if you want to get a stable working modem back, just run fastboot erase modemst1 && fastboot erase modemst2 again.

    Regards,
    Michael
    5
    I have tried to enable the 800, 1800 and 2600 MHz LTE-frequencies by modifying NV-item 6828 and changing/deleting /nv/item_files/modem/mmode/lte_bandpref in EFS. The result is sadly always the same for each of the frequencies: The modem crashes when it tries to switch to one of the LTE frequencies and produces the following error message:

    Code:
    Error in file rflte_msm.c, line 482

    As we don't have the source for the modem-firmware, we can't fix that...

    So it seems we are out of luck regarding additional LTE frequencies on our phones, as no modem from other similar phones will work correctly for us. I was too tired yesterday to check if older modems work, but I wouldn't put much hope into it.

    EDIT: Same problem with modem from 4.0.4-7.7.1Q-6_SPR-125_ASA-10-11 :(

    Regards,
    Michael
    3
    Found the PAM datasheet, attached FYI.

    http://www.avagotech.com/pages/en/rf_microwave/amplifiers/linear_power/multiband_multimode/ said:
    Multi-mode Multi-band Power Amplifiers

    Avago Technologies multi-mode, multi-band power amplifiers support different operating modes (CDMA, UMTS, LTE and GSM/EDGE) and multiple frequency bands, and offer premium performance in a very small form factor.

    ACPM-7081 - Quad-Band GSM/EDGE and Dual-Band UMTS (B1/B8)
    • Quad Band GSM/EDGE (GSM850/900, DCS1800/PCS1900)
    • UMTS Dual-Band (Band1 UMTS & CDMA BC6 and Band8 UMTS & LTE)
    • Small size (7.5x5mm)

    ACPM-7051 – Quad-Band GSM/EDGE and Dual-Band UMTS (B1/B5)
    • Quad Band GSM/EDGE (GSM850/900, DCS1800/PCS1900)
    • UMTS Dual-Band (Band1 – UMTS & LTE & CDMA BC6 and Band5 UMTS & LTE & CDMA BC0)
    • Small size (7.5x5mm)


    ACPM-7251 – Quad-Band GSM/EDGE and Dual-Band UMTS (B1/B5)
    • Quad Band GSM/EDGE (GSM850/900, DCS1800/PCS1900)
    • UMTS Dual-Band (Band1 – UMTS & LTE and Band5 UMTS & LTE)
    • Small size (7.5x5mm)
    1
    Dear All,

    I recently got this device in Hong Kong and is hapi with its performance!
    But I am still wondering if this device could actually use the LTE available in HK?
    I knw the msm8960 claimed to be capable of utilizing all frequency of radio,
    so is it possible that there is some soft lock in the baseband?

    Could i flash the baseband or replace the modem driver from other device to access other frequency?

    any idea is appreciated!

    Thanks!
    Vasco