Any chance to enable all LTE frequency supported by MSM8960?

Loader009 · Aug 15, 2013

jhgfjhgf1 said:
Sorry, what's that?

-> http://en.wikipedia.org/wiki/Baseband_processor

edit: Are we able to flash a Modem firmware from another MSM8960 Phone to enable LTE frequencies?

JTY · May 7, 2014

any updates on this matter ?

Loader009 · May 7, 2014

I haven't read something new.
No update so far.

CornholioGSM · May 10, 2014

Loader009 said:
I haven't read something new.
No update so far.

as i know....but i am not 100% sure...in photon is not antena switch and antena amp for support other frequences.
so you can switch it...but no lte signal

...so processor can use this freqw but is nothing to amp it...

Loader009 · May 11, 2014

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 · Jun 27, 2014

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 · Aug 19, 2014

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 · Aug 23, 2014

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 · Sep 13, 2014

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

CornholioGSM · Sep 29, 2014

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

enigma9o7 · Sep 29, 2014

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)

stargo · Oct 1, 2014

enigma9o7 said:
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

Azlun · May 11, 2015

！

stargo said:
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！

Nido221 · Mar 3, 2016

Azlun said:
really good post！

Awesome! You really did a good research.

yahyazadeh58 · Mar 29, 2016

Qualcomm MSM8960.

stargo said:
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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Any chance to enable all LTE frequency supported by MSM8960?

Loader009

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