Any chance to enable all LTE frequency supported by MSM8960?

Search This thread

disablewong

Member
Apr 19, 2009
24
3
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
 
  • Like
Reactions: novodsk212000

Loader009

Senior Member
Jul 6, 2012
711
198
I tried to figure out, if our Photon Q is supporting more LTE bands than 1900 MHz (#2 or/and #25).
-> http://en.wikipedia.org/wiki/E-UTRA#Frequency_bands_and_channel_bandwidths

On some sites there are reports for having another band. (Have to search again, I think it was 850 MHz, #26 or 700 MHz, #12/#17/#29.)
I have also searched for supported frequencies for MSM8960.
I found some BlackBerry devices based on that SoC and 2 different versions of supported LTE bands.
One version (UK) supported 4 in europe used bands und the other version (US) supported 4 in US/Canada used bands.

I think that the Photon Q is like the BlackBerry US version and supports 4 LTE bands in US/Canada.
If you need a few sites, I will search again and show it to you.

The strange thing is, if I set to LTE only (via 4636) I can see all 4 carrier (germany).
We have 3 bands with LTE on it, but I can only get signal to max 2 of them.
Band 3, 7 and 20 (1800, 2600, 800 MHz).
The weird thing is, that on band #20 (800 MHz) only 3 carrier are active, so it has to be band #3 or #7.
Maybe I'm missinterpreting things and thats just a sideeffect of crossing bands of LTE US and UMTS Germany.

On stock ROM there was another "secret phone code" to see what the phone-part is doing. (From qualcomm I believe.)
I think I will test it some other day, to see which band is active.

At last, I was never been able to "login" or "register" into my carriers network within LTE.


Please discuss about that possibility, I really want to find out, which frequencies are supported by our phone on LTE.
 

disablewong

Member
Apr 19, 2009
24
3
I tried to figure out, if our Photon Q is supporting more LTE bands than 1900 MHz (#2 or/and #25).
-> http://en.wikipedia.org/wiki/E-UTRA#Frequency_bands_and_channel_bandwidths

On some sites there are reports for having another band. (Have to search again, I think it was 850 MHz, #26 or 700 MHz, #12/#17/#29.)
I have also searched for supported frequencies for MSM8960.
I found some BlackBerry devices based on that SoC and 2 different versions of supported LTE bands.
One version (UK) supported 4 in europe used bands und the other version (US) supported 4 in US/Canada used bands.

I think that the Photon Q is like the BlackBerry US version and supports 4 LTE bands in US/Canada.
If you need a few sites, I will search again and show it to you.

The strange thing is, if I set to LTE only (via 4636) I can see all 4 carrier (germany).
We have 3 bands with LTE on it, but I can only get signal to max 2 of them.
Band 3, 7 and 20 (1800, 2600, 800 MHz).
The weird thing is, that on band #20 (800 MHz) only 3 carrier are active, so it has to be band #3 or #7.
Maybe I'm missinterpreting things and thats just a sideeffect of crossing bands of LTE US and UMTS Germany.

On stock ROM there was another "secret phone code" to see what the phone-part is doing. (From qualcomm I believe.)
I think I will test it some other day, to see which band is active.

At last, I was never been able to "login" or "register" into my carriers network within LTE.


Please discuss about that possibility, I really want to find out, which frequencies are supported by our phone on LTE.



Dear Loader009,

Thanks for your information! I'm really impressed that you could actually search the carrier in 'LTE only from Germany!
Could you please share the version of ROM you are using?
And if possible, any screenshot? I really want it can be used in HK with LTE(1800, 2100 & 2600Mhz)

Also do you have more information about the secret phone code? I think it would be interesting

Actually, I noted that xt925 and xt905 are using the same chip MSM8960 with LTE usable in HK.
Is there anyone can locate the radio/baseband of their rom and port it for XT897?
I am willing to try it with my machine.
If this work, I think we could use this photon q all over the world!
Any idea?

Regards,
Vasco
 

disablewong

Member
Apr 19, 2009
24
3
Dear Loader009,

Thanks for your information! I'm really impressed that you could actually search the carrier in 'LTE only from Germany!
Could you please share the version of ROM you are using?
And if possible, any screenshot? I really want it can be used in HK with LTE(1800, 2100 & 2600Mhz)

Also do you have more information about the secret phone code? I think it would be interesting

Actually, I noted that xt925 and xt905 are using the same chip MSM8960 with LTE usable in HK.
Is there anyone can locate the radio/baseband of their rom and port it for XT897?
I am willing to try it with my machine.
If this work, I think we could use this photon q all over the world!
Any idea?

Regards,
Vasco

Of course, I was just blind guessing the hardware for xt926 and xt907 are using the same hardware.
If not, there should be one chip controlling the modem channel of the device to be replaced.
But WHICH ONE???
Any expert in this area can solve this question? I am a dummy for radio stuffs
 
J

jhgfjhgf1

Guest
Dear all,

I'm also very interested in this topic since I imported a Photon Q to Germany and was wondering if it's possible to use the local LTE 800/1800/2600 bands.

I think the first thing we have to find out is whether the hardware is capable of using other bands than the 1900 band listed on the Motorola website. As Loader009 states he could see LTE carriers which are known to use different bands I assume the hardware can do it. Otherwise the carriers wouldn't have been listed, right? Maybe someone from another country with different frequency bands can check and confirm that he can see those carriers as well?

Thus, the limitation to the 1900 band should be software-made and could be modified by a developer. I hope someone can participate at that point as I don't know much about coding...
 
Last edited:

Loader009

Senior Member
Jul 6, 2012
711
198
I'm using CM10.1.
I can't remember the secret phone code, I have to do research again.
This secret phone code only works on Stock ROM. (I stupidly deleted it, when it wasn't working on CM10 anymore.)

The one secret phone code I used to force "LTE only" was *#*#4636#*#*.
Please DON'T change the baseband (don't even tap on it).
This can do problems to you. (I had to use QPST to recover the supported frequencies.)

Also, developers (afaik) can't modify the modem firmware.
We also don't even know, which LTE bands the Photon Q is capable of. (Except 1900 MHz)
 

Loader009

Senior Member
Jul 6, 2012
711
198
I've got my 32GB SDCard back and will test it in the next few days out.
I hope I'll find that secret phone code, I'll also make a few screenshots.
 

Loader009

Senior Member
Jul 6, 2012
711
198
Got the code!
##33284# <- ##DEBUG#

It only works on stock afair!
I'll test tomorrow, it's about 3am now >.<
 

Ronin2012

Member
Jun 12, 2012
5
2
Munich
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



I have read the "QU_SnapdragonS4_White_Paper_FNL_Rev6.pdf" and found there following entry:

-----------------------------------------------------------
• Industry’s first fully integrated 3G/4G world/multimode LTE Modem: <<<Supports all of the world’s leading 2G, 3G and 4G LTE standards>>>.
It also includes integrated support for multiple satellite position networks (GPS and GLONASS) as well as short range radios via Bluetooth,
WiFi, FM and NFC.

• Designed for speed, compatibility and power savings:
Snapdragon S4 Processor MSM8960 chipset includes the industry’s only complete platform that integrates all of the world’s leading 2G, 3G and 4G mobile broadband modem technologies on a single chip. This new integrated multimode modem is based on an advanced, programmable architecture that is performance, size and power optimized for the fastest combination of modems available for:
- LTE FDD/TDD (Cat3)
- 3G (DC-HSPA+ Cat 24)
- EV-DO Rev. B
- 1x Advanced
- TD-SCDMA
- GSM/GPRS/EDGE NFC.

Multimode/Multiband Means Worldwide Coverage.
• Support for multiple radio frequencies: Mobile broadband technologies are growing increasingly complex in their implementation. LTE is currently being implemented in over 40 diff erent radio frequency bands throughout the world. To complement its wide range of modem standards supported, Qualcomm has designed the Snapdragon S4 Processor MSM8960 CHIPSET platform to <<< address all commonly-used frequencies (from 700–2600 MHz) and bandwidths up to 20 MHz>>>, allowing its customers to address any mobile network opportunity whether the simplest single frequency implementation to the most extensive multi-frequency global mode, whether 4G, 3G or 2G.
-----------------------------------------------------------

Based on the document the chip can handle all LTE Standards, but it depends on his "advanced, programmable architecture"....as written there and how Motorola / Sprint implemented this, maybe they reduced LTE only to one Standard.
I don't have LTE in my area and so I cannot test this.
 

Loader009

Senior Member
Jul 6, 2012
711
198
That's possibly right.

Something else:
If I remember correctly, somewhere in this forum have been said that for CDMA the internal Sprint "ID"(?) is used.
Maybe that's also the reason why I cannot connect to LTE in my area.
The phone is trying to "login" with the Sprint ID and this of course won't work.

The ##DEBUG# menu wasn't helpfull. It shows frequencies for american standards and not for GSM/WCDMA.
Also the LTE menu is also not very helpfull, it doesn't show frequencies at all.
 
J

jhgfjhgf1

Guest
Any News on this topic?

Maybe one of the developers can give a statement?
 

Loader009

Senior Member
Jul 6, 2012
711
198
Yesterday I tested a LTE compatible SIM card.
My Bro has a Samsung Galaxy S4 with 4G/LTE in my area.

So I've put his SIM-Card into my Photon Q and set LTE only.
I had no luck, the Phone couldn't register into the network for this SIM.

I guess either it has the wrong frequencies or LTE is for inbuilt "SIM" (Sprint SIM?) only.
 

zodiac12345

Member
Aug 24, 2012
40
15
LTE is configured only for Sprint's frequencies, however, it supports the United States frequencies of PCS blocks A-G. The G Block is Sprint's current LTE channel, and they may deploy it later on Blocks A through F, depending on if they own the spectrum in a given market. The reason you see EU networks when the phone is in LTE Only Mode is most likely because the Phone still sees GSM signals, but will only connect to LTE ones from those GSM signals. Likewise, in the US, if you force LTE Only and then search for networks, AT&T and T-Mobile US will come up as the GSM carriers the Photon Q sees, rather than the LTE signals it sees.

Setting the Photon to LTE Only will not do anything for LTE in the EU. I suspect that if another carrier in the EU uses the 1900 MHz for LTE, the Photon Q will have no issues connecting to LTE in Europe. But until that time, be happy with HSPA.
 

hfase

Senior Member
Jan 11, 2013
104
40
hfase.com
IIRC The only place with 850mhz LTE available is the Chicago market and currently no phones at all support it. :crying:

Not only does your phone need to support it, your PRL and cell-site does too...
 

Top Liked Posts

  • There are no posts matching your filters.
  • 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
    deskafbd62.jpg


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