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Sprint LG-LS980 that was unlocked for T-Mobile, but no LTE service

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AzAssassin
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Default Sprint LG-LS980 that was unlocked for T-Mobile, but no LTE service

First off, I hope I am putting this in the proper section. The LG G2 I have is an original Sprint-branded device (LG-LS980), but it has been rooted/modded/flashed to be compatible with T-Mobile and I am hoping for some help with getting the phone to receive T-Mobile's LTE signal, so I wasn't sure what LG G2 section to post this in (Sprint's or T-Mobile's). If this is not the right place, please let me know where I should post it and I will be glad to move it to/re-post it in the appropriate section.

With that stated, I bought this phone from someone off of Craigslist two days ago. It was listed as an "Unlocked LG G2" and when I texted the guy and asked him what carrier the phone was for, he told me it was for T-Mobile; so I believed/assumed it was a T-Mobile LG G2 device that was also unlocked. When I met the guy in person, he was very friendly and gave me time to check out the phone myself and to test my T-Mobile SIM card in it. When I turned the phone on after inserting my SIM card to make a test call, the 'T-Mobile LTE' screen was shown during the startup process, which further led me to believe that it was, indeed, an actual T-Mobile LG G2. So, I bought the phone for $260. After I left and got to use the phone for a while, I noticed that there was no T-Mobile logo on the back of the phone, so I Googled the model number (LG-LS980) and realized that it was actually a Sprint device. After realizing this, I also noticed that the phone only displayed the '4G' logo on the front screen, which led me to believe that it was not picking up an LTE signal (I am not familiar with the LG G2, so I wasn't sure what symbol would be displayed). After logging in with my Google account and downloading/installing the SpeedTest.net app, I ran a few tests and it's definitely not getting LTE speeds; it even seems to be getting relatively-slow speeds for 4G/HSPA+ (around 6Mbps Up/2Mbps Down).

So, my question is this: Can this Sprint LG G2 properly receive an LTE signal with a T-Mobile SIM card? And if so, what do I need to do to make this happen?

For the record, the person who rooted/flashed/modded this phone seems to have done a good job in making it compatible with T-Mobile (for the most part). To my knowledge, everything other than picking up T-Mobile's LTE signal seems to be in excellent working order. The camera works nicely; even on 4G, opening webpages is still fast; the music player works; text and picture messaging work properly; and WiFi-calling is even showing up in the Settings as an option (which, to my knowledge, is exclusively a T-Mobile feature. The phone is even showing up as an LG-D801 in the device's Settings.

I also want to add that there is an icon for 'SuperSu Installer' with a message that reads, "Tap to install SuperSU and root your device," but I have been scared to even mess with this feature. I did click the SuperSU icon and a page opened that showed this: "SuperSu is not yet fully installed - your device is not fully rooted. To finish rooting, the SuperSU GUI needs to be installed. This can be done by instaling it through GooglePlay, or by downloading the flashable ZIP and installing it through TWRP." And there is some more to the message below that, but I did not want to take the time to type every word.


So, do I need to go through the process of "fully rooting" this phone in order to be able to properly receive an LTE signal with my T-Mobile SIM card? Or could I possibly damage the phone by trying that process without knowing what I'm actually doing? Or, is completing the rooting process something that needs to be done regardless, even if it's not going to help with with the LTE issue?

Also, I tried to change the APN settings in hopes of getting LTE to work, but the option to change/alter the APN settings seems to be disabled. Does this likely have something to do with the phone not being fully rooted?

I also want to mention that when I went to check for an update in the 'Update Center,' it is showing an 'Android System Update' that is specifically for T-Mobile and it's apparently 149.6 MB in size. Should I try to download and install this T-Mobile update? Or is this something that should not be done without fully rooting the phone with SuperSU Installer?

Also, for the record, it is currently running Android version 4.2.2, Kernel version 3.4.0, Build number JDQ39B, and Software version D80110c


I apologize for writing such a lengthy post, but I wanted to be thorough and try to give as much pertinent information as I could think of. FYI, the LG G2 I have is a 32GB device. I am considering just trying to trade it for a Nexus 5, Galaxy S4 or HTC One, to someone who knows about rooting/flashing/modding, but I figured I would at least ask if there might be a simple fix for the LTE issue before trying to trade/sell it.

I would sincerely appreciate any help that I get! And if I need to make a donation for the help, I would be glad to do so. Also, I can provide pictures and/or screenshots for any detailed information that I may need to provide to help with this issue. Thanks very much in advance to anyone who tries to help me with this issue!!
 
abhinav.tella
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(Last edited by abhinav.tella; 19th April 2014 at 10:01 AM.)
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If its indeed the Sprint LS980 and not the T-Mobile D801, then you got screwed because the LTE bands are not compatible. File a complaint and get your money back. He probably modded it to enable GSM. If you sell it to a Sprint user make sure everything is back to stock or it may brick during an OTA, which the next person would blame you for.

LG G2
LS980 (Sprint)
(Stock ZVC Rom)
Past Devices: HTC Butterfly, HTC One X - Tegra 3, LG Nitro HD, LG G2x, Samsung Vibrant, Samsung Galaxy 3, Nokia 5800, Motorola Razr Maxx, Palm Treo 650
 
sudosurootdev
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Check out http://forum.xda-developers.com/show....php?t=2521276

Sent from my LS980 4G using Tapatalk
 
AzAssassin
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Quote:
Originally Posted by abhinav.tella View Post
If its indeed the Sprint LS980 and not the T-Mobile D801, then you got screwed because the LTE bands are not compatible. File a complaint and get your money back. He probably modded it to enable GSM. If you sell it to a Sprint user make sure everything is back to stock or it may brick during an OTA, which the next person would blame you for.
Thanks for replying. As for what you're suggesting, that the Sprint LG G2 is not capable of receiving T-Mobile's LTE signal because of it not having the necessary LTE bands, are you absolutely sure of this? And if so, do you mean that it will not receive any LTE signal whatsoever with a T-Mobile SIM card? Or that it just does not have the proper bands to detect/receive all of the LTE bands?

As for the phone I have actually being the Sprint LG G2 (LG-LS980) device, I am sure that's what it is, as that is the model number that is on the bottom of the back of the phone. However, as I stated, I bought it from someone off of Craigslist (not eBay), so there is no way for me to file a complaint. However, I think I should be able to re-sell it and get my money back, as $260 seems to be a good/reasonable price for a 32GB model in excellent condition.


Quote:
Originally Posted by sudosurootdev View Post
Check out http://forum.xda-developers.com/show....php?t=2521276

Sent from my LS980 4G using Tapatalk
Thanks for the link. I clicked it and checked out that thread, but I was not really sure what it was about. Are you suggesting that I could/should possibly go through the process to try to "Obtain Your MSL, Update PRL, Connect to DFS," because it might enable the phone I have to properly receive T-Mobile's LTE signal? If you would reply to this question and explain to me what good you think trying to go through that process might do for my situation, I would really appreciate it.

By the way, sorry for not replying last night, y'all. I work late-nights and was quite tired after I got home around 6:00 a.m. this morning.
 
abhinav.tella
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(Last edited by abhinav.tella; 20th April 2014 at 05:00 AM.)
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Sprint LS980 uses 1900 MHz, 850 MHz, 2500 Mhz for LTE
2G: GSM850, GSM900, GSM1800, GSM1900
3G: UMTS2100 (B1)
4G: LTE1900 (B25), LTE800 (B26), TD-LTE2500 (B41)
http://pdadb.net/index.php?m=specs&i...s980_g2_td-lte

Verizon VS980 uses the 700 Mhz, 1700/2100 Mhz bands for LTE
2G: GSM850, GSM900, GSM1800, GSM1900
3G: UMTS850 (B5), UMTS900 (B8), UMTS1900 (B2), UMTS2100 (B1)
4G: LTE700 (B13), LTE1700/2100 (B4)
http://pdadb.net/index.php?m=specs&i...s980_g2_4g_lte

T-Mobile D801 uses the 700 Mhz, 1900 Mhz, 1700/2100 Mhz bands for LTE
2G: GSM850, GSM900, GSM1800, GSM1900
3G: UMTS850 (B5), UMTS1900 (B2), UMTS2100 (B1)
4G: LTE700 (B17), LTE1700/2100 (B4), LTE1900 (B2)
http://pdadb.net/index.php?m=specs&i...g2_d801_4g_lte

AT&T D800 uses the 700 Mhz, 850Mhz, 1900 Mhz, 1700/2100 Mhz bands for LTE
2G: GSM850, GSM900, GSM1800, GSM1900
3G: UMTS850 (B5), UMTS1900 (B2), UMTS2100 (B1)
4G: LTE700 (B17), LTE850 (B5), LTE1700/2100 (B4), LTE1900 (B2)
http://pdadb.net/index.php?m=specs&i...g2_d800_4g_lte

Bands are limited by hardware, not software.
Also note the Sprint 1900 Mhz LTE and Verizon 700 Mhz LTE bands are not compatible with the T-Mobile/AT&T 700 Mhz and 1900 Mhz LTE band as they use a different part of that spectrum.

LG G2
LS980 (Sprint)
(Stock ZVC Rom)
Past Devices: HTC Butterfly, HTC One X - Tegra 3, LG Nitro HD, LG G2x, Samsung Vibrant, Samsung Galaxy 3, Nokia 5800, Motorola Razr Maxx, Palm Treo 650
 
AzAssassin
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Quote:
Originally Posted by abhinav.tella View Post
Bands are limited by hardware, not software.
Also note the Sprint 1900 Mhz LTE and Verizon 700 Mhz LTE bands are not compatible with the T-Mobile/AT&T 700 Mhz and 1900 Mhz LTE band as they use a different part of that spectrum.
Sorry for quoting the entire post, but I'm at work and on my LG F3 (which has a really small screen), but are you specifically stating that it's physically impossible to get T-Mobile's LTE signal with the Sprint version of the LG G2 because it literally lacks the necessary physical hardware to be able to receive it?
 
abhinav.tella
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(Last edited by abhinav.tella; 20th April 2014 at 09:56 AM.)
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Quote:
Originally Posted by AzAssassin View Post
Sorry for quoting the entire post, but I'm at work and on my LG F3 (which has a really small screen), but are you specifically stating that it's physically impossible to get T-Mobile's LTE signal with the Sprint version of the LG G2 because it literally lacks the necessary physical hardware to be able to receive it?
Yes, only the AT&T and T-Mobile versions are inter compatible with the AT&T version having one extra band (850 Mhz)

For future reference use PDADB.net for accurate hardware information including sub-models. Its very good.

LG G2
LS980 (Sprint)
(Stock ZVC Rom)
Past Devices: HTC Butterfly, HTC One X - Tegra 3, LG Nitro HD, LG G2x, Samsung Vibrant, Samsung Galaxy 3, Nokia 5800, Motorola Razr Maxx, Palm Treo 650

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