[Q] Getting GSM 850MHz on JASJAR - Android Q&A, Help & Troubleshooting

Hello Guys,
Is there anyway I can upgrade or downgrade JASJAR ROM to be able to use GSM 850 MHZ band insted of 900?? AT&T uses 850 and I'm getting very low signal on my cell.
Thanks

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[Q] 1700/ 2100 or 1900 /850 MHZ Radio Rom for HTC HD2 (Asia Pacific Version)

Hi,
I purchased my HTC HD2 in India having HSPA: 900/2100 MHz band. I'm travelling to the US this month where AT&T has their 3G in 1900/850 band and T-Mobile has their 3G in 1700 (AWS Band). Is there anyway possible to flash my radio rom to support either T-Mobile or AT&T 3G Band?
My Phone Software Info
ROM version
1.66.707.1(76641) WWE (Official)
Radio Version
2.06.51.07
HSPL
1.66
Regards
Prabu
The answer is NO, prabu. You'll be stuck on EDGE no matter which carrier you're on (AT&T or TmoUS).
Thank You for the response, Will it work if I flash my phone with T-Mobile ROM?
No. It's a matter of hardware. A software flash will not enable HSPA on your Euro/Asia HD2.

Unlock Europe 3G (HSDPA 900 / 2100 )

Hello,
In Europe HTC Aria can't connect to 3G network HSDPA 900 / 2100. In specification is described HSDPA 850 / 1900 (AT&T)
Is it possible radio ROM to unlock 3G Europe network ?
Than you!
expsvetly said:
Hello,
In Europe HTC Aria can't connect to 3G network HSDPA 900 / 2100. In specification is described HSDPA 850 / 1900 (AT&T)
Is it possible radio ROM to unlock 3G Europe network ?
Than you!
Click to expand...
Click to collapse
No, there's nothing you can do about that.

[Q] Can i get 850mhz HSDPA Exhibit 4g ?

Hello everyone, it's possible to enable 850mhz HSDPA band on the exhibit 4g? i've bought it unlocked and using it on Telcel mexico, but telcel only works on 850/1900 mhz HSDPA HSDPA+ while the exhibit only works on 1700/2100, so it's working only on the slow edge network :-/ . It's there a way to enable the 850 or 1900 band on the exhibit? :O i've read its possible in other samsung phones..
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lG lancet GSM band unlocking.

Hi guys new to the site, i was wondering if they were guides or so forth to get the LG lancet (Android 5.1) to unlock its GSM bands primarily i need these
Digicel: GSM 900/1800 MHZ, UMTS 900 MHZ
Lime: GSM 850/1900 MHZ, UMTS 850/1900 MHZ
Any advice or guides will be appreciated thank you.

Is it possible to change the frequecy a phone can recieve?

Hello Everyone,
OK, let me explain myself. I live in Dominican Republic, and over here we have 3 major telephone companies: Viva, Orange Dominicana and Claro Dominicana.
Each operates within their own frequency spectrum and some have compatible bands, BUT, when it comes to 3G connection, the problems arise.
SO:
Frecuency Bands for CDMA, GSM, 3G and 4G (Orange Dominicana)
CDMA N/A
GSM/EDGE 900 MHz / 1800 MHz / 1900 MHz
3G 900 MHz
4G 1800 Mhz (Band 3)
Frecuency Bands for CDMA, GSM, 3G and 4G (Claro Dominicana)
CDMA 1900 Mhz
GSM/EDGE 850 MHz / 1900 MHz
3G 850 MHz
4G 1700 Mhz / 2100 Mhz (Banda 4 AWS)
As you can see, 3G for Orange operates on 900MHz and 3G on Claro operates on 850Mhz (though they have compatible 1900MHz band, all good here). This means that the signal will not be recieved and 3G(as in H and H+ if not mistaken) will not be available if your phone does not have the appropiate radio reciever(i think). I own a At&t Samsung Note 3 (SM-N900A) and the bands that the phone recieves are:
GSM: 1800, 1900 MHz
UMTS: 900 MHz
4G: 1800 MHz (Band 3)
First off, as I am writing this post, have noticed that i have most bands compatible except 4G LTE (Yet when i connect to the network, my phone will not display: E+, H or H+ over the data icon in the notification bar, it only shows E). Second, for more background data, i will at the end of the post type the relevant information from the "about device" tab on settings. Third, my question is NOT related to hardware, if I have to get new hardware to achieve what i am looking for then I'd just get a new phone (Why not get a phone and not go through this hassle? I like to run out of option before doing drastic measures and i like projects).
Here goes: Can I, somehow software related, modify the phone's ability to pick up 4G LTE? also, Can I, somehow software related, modify the phone's ability to pick up 850MHz in the GSM band WITHOUT loosing the 900Mhz that i currently get?(because i get great internet, but not everywhere). ANY way you know that this is possible is welcome, no matter how drastic it may seem.
I have kinda advanced knowledge on technological things and I am willing (if pointed in the right direction) do my homework.
Thanks in advanced.
Phone specs:
SAMSUNG SM-N900A
ANDROID VERSION: 5.0
BASEBAND VERSION: N900AUCUEOC2
BUILD NUMBER: LXR21V.N900AUCUEOC2
It is NOT rooted, and I (don't know previous owners) have not updated the phone's software
One thing to keep in mind is that the phone has a locked bootloader and AT&T never released a full ROM after 4.1.1. All updates to the phone were released as OTA updates.
OTA???, and what happens if the bootloader is locked? What is restricted by this?
Edit: just G'd bootloader, so the only way to do this is through custom ROM, BUT since the bootloader is locked, then im f*ckd?
Locked bootloader means no twrp, Cwm, or philz.
OTA=over the air.
I'm not sure if having a locked bootloader will prevent you from adding frequencies but it certainly won't help since safestrap is the only recovery that I have seen on the n900a.
Kinda wierd to ask since it might not be possible but: Cant I pretend to be ATT to the phone, perform an OTA update and opening the bootloader? I know its not that simple but what the hay

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