[Motorola Atrix HD] theenlightened1:
Hi All!!

Was just wondering if it is at all possible to replace or add/unlock additional LTE bands on our AHD?

As it stands now: ATRIX HD has the following bands and frequencies: LTE 700 and 1700 / 2100 (Bands 4, 17). Both USA.

The problem is LTE was introduced quite recently here in Pakistan and the frequency/band they are using is 1800MHz (Band 3, I believe?). So I can use 3G internet with my AHD but not the LTE.

Now as our phone is also based on the MSM8960 chipset, I did a quick research to see what other MSM8960 chipset phones have in terms of LTE bands. Quite a few do have the 1800MHz freq I need.

RAZR HD: LTE 800 / 1800 / 2600 (Bands 3, 7, 20)

RAZR HD XT925: LTE 700 (Band 13)

RAZR M XT905: LTE 1800 / 2600 (Bands 3, 7)

Photon Q XT897:LTE 1900 (Band 25)

HTC Windows 8X:LTE 700 / 850 / 1700 / 1900 / 2100 (Bands 2, 4, 5, 17) - AT&T

BB Z10:LTE 800 / 900 / 1800 / 2600 (Bands 3, 7, 8, 20) - STL100-2

And I did visit the official Qualcomm page and they say the MSM8960 has "world/multimode" LTE.

Now my question is are we limited by hardware or software?

And this is where I need help understanding the following link:

1) Look at Page 3 of the following PDF file. This shows a complete hardware breakdown of our AHD phone. It shows the various PA (Power Amps) and other components the phone has as well as how data flows. According to this, is our phone limited by hardware to just the bands we have now or is it possible to unlock new bands and use them?

http://www.techinsights.com/uploadedFiles/Public_Website/Content_-_Primary/Marketing/2013/techinsights-motorola-atrix-hd-mb886.pdf

Also the following photo proves that the RTR8600 transceiver on our AHD is capable of LTE @ 1800MHz (Look at 4th Gen column): http://images.anandtech.com/doci/6541/IAR Summit Nov 2012_Serge_Jim_Page_20.png

If not limited by hardware. Has anyone heard of a software called "Qualcomm Prod Support Tool" I ask this because I came across "QPST?" which claims to unlock the bands on Qualcomm processors. While keeping the existing bands unharmed.

This link shows how to use QPST:

2) http://galaxys4root.com/galaxy-s4-t...aws-bands-on-att-galaxy-s4-sgh-i337sgh-i337m/

Also found a thread about QPST WRT Samsung S5:

3) http://xdaforums.com/galaxy-s5/general/how-to-add-rf-lte-frequency-bands-to-t2886059

So.

1. Has anyone here ever used QPST or know of any other method to unlock bands (if at all possible)?

2. Can we just flash modem firmware (baseband) from another MSM8960 phones to enable LTE frequencies on AHD? Asking this as CM11 for MSM8960 works on all devices and hardware of all the MSM8960 phones (similar drivers?)

Any and all help/guidance on the matter will be greatly appreciated as my other alternative is replacing the phone I bought not 6 months ago. Also I know of all the legal concerns on this matter as I am not in EU or US I believe I am at little risk of FCC coming after me :) My point is, please add useful and knowledgeable replies to this thread concerning the topic at hand instead of telling me FCC or AT&T will catch me..

I'm currently rooted with Phil'z Touch recovery(unlocked BL) and CM11. Phone is not locked to AT&T.

Thanks in advance!