[Solved][Q] LT28at Flashed with baseband LT28i now LTE not working - Sony Xperia S, Acro S, Ion

Hi Everyone,
I been searching the forums but unable to find an answer to this question. I have a LT28at (AT&T Xperia ion) and i flashed it with the baseband of LT28i (from .69 package). Now the phone will not pick up t-mobile LTE bands. I was wondering if there is anyway i could manupulate it to pick up LTE whenever it detects it and still have AWS bands for HSPA+? I am in the SF Bay Area where t-mobile has LTE.
Thanks for the help in advance.
:laugh:
Use *#*#4636#*#* -> phone information
Change "WCDMA preferred" to "LTE(preferred/WCDMA/GSM"
If you are not getting LTE

I would check to make sure the APN info is there first. From what I understand this device does not work well on Tmo as it does not support the 1700 band. But if your in a spot that Tmo is using the shared 1900 band it should work. I have never tried so cant be much more help than that.

My apn is correct... It is set to fast.t-mobile.com. So I know it's not the apn settings.

have you tried to flash all the complete firmware?

Hmmm nevermind. :silly:

archie87 said:
Quick question; Were you getting LTE before you flashed the firmware?
Also, your phone says H at the top right? Not 4G? Lol.
The LT28at doesn't support AWS uplink HSPA+ btw.
Click to expand...
Click to collapse
I am getting LTE now I fixed it in the settings LT28at does support LTE AWS and been using LTE on AWS for T-Mobile.
So my screen with *#*#7378423#*#* -> configuration shows the following:
"Working band/s:"
GSM 850, GSM900, GSM1800, GSM1900, UMTS_BC1 (2100), UMTS_BC2 (1900), UMTS_BC4 (1700), UMTS_BC5(850), LTE_BC4 (AWS which T-Mobile uses), LTE_BC17 (700 AT&T)
Also Once the Flashed LT28i baseband the default was set to WCDMA preferred that is why I could not get LTE. But I fixed it with *#*#4636#*#* and set it to LTE (preferred)/WCDMA/GSM

DEEE38 said:
I am getting LTE now I fixed it in the settings LT28at does support LTE AWS and been using LTE on AWS for T-Mobile.
So my screen with *#*#7378423#*#* -> configuration shows the following:
"Working band/s:"
GSM 850, GSM900, GSM1800, GSM1900, UMTS_BC1 (2100), UMTS_BC2 (1900), UMTS_BC4 (1700), UMTS_BC5(850), LTE_BC4 (AWS which T-Mobile uses), LTE_BC17 (700 AT&T)
Also Once the Flashed LT28i baseband the default was set to WCDMA preferred that is why I could not get LTE. But I fixed it with *#*#4636#*#* and set it to LTE (preferred)/WCDMA/GSM
Click to expand...
Click to collapse
Hello @DEEE38,
Please Mark The Thread As [SOLVED].
So others members can benefit from it.
Thank You.
Regards,
Dwarkesh Soren

DEEE38 said:
I am getting LTE now I fixed it in the settings LT28at does support LTE AWS and been using LTE on AWS for T-Mobile.
So my screen with *#*#7378423#*#* -> configuration shows the following:
"Working band/s:"
GSM 850, GSM900, GSM1800, GSM1900, UMTS_BC1 (2100), UMTS_BC2 (1900), UMTS_BC4 (1700), UMTS_BC5(850), LTE_BC4 (AWS which T-Mobile uses), LTE_BC17 (700 AT&T)
Also Once the Flashed LT28i baseband the default was set to WCDMA preferred that is why I could not get LTE. But I fixed it with *#*#4636#*#* and set it to LTE (preferred)/WCDMA/GSM
Click to expand...
Click to collapse
I said uplink AWS HSPA+ not LTE.
Thanks for posting the resolution.

archie87 said:
I said uplink AWS HSPA+ not LTE.
Thanks for posting the resolution.
Click to expand...
Click to collapse
2100 UMTS_BC1 is actually T-Mobile's downlink
1700 UMTS_BC4 is T-Mobile uplink. :good:

DEEE38 said:
2100 UMTS_BC1 is actually T-Mobile's downlink
1700 UMTS_BC4 is T-Mobile uplink. :good:
Click to expand...
Click to collapse
That's correct. Then the question is, does flashing the baseband actually change the frequencies used by the phone? I didn't think it did but now it sounds like flashing the international baseband enables the 1700 frequency.

archie87 said:
That's correct. Then the question is, does flashing the baseband actually change the frequencies used by the phone? I didn't think it did but now it sounds like flashing the international baseband enables the 1700 frequency.
Click to expand...
Click to collapse
It seems so. The original a authors of the threads are the ones to give credits to. I was simply asking how to enable LTE back after the international baseband flash. Everything works great! 1900 bands picks up really well for 1900 band reframed on T-Mobile. When I get into a zone with AWS1700/2100 it changes over pretty quickly. As for LTE, it picks it up whenever the LTE is available. Currently I am using Open Signal's widget to see what kind of bands it picks up.
Here are the original two threads:
Stock firmware (credits to Spectre51):
http://forum.xda-developers.com/showthread.php?t=1752345
"Guide" (credits to mingkee):
http://forum.xda-developers.com/showthread.php?t=2180828

DEEE38 said:
It seems so. The original a authors of the threads are the ones to give credits to. I was simply asking how to enable LTE back after the international baseband flash. Everything works great! 1900 bands picks up really well for 1900 band reframed on T-Mobile. When I get into a zone with AWS1700/2100 it changes over pretty quickly. As for LTE, it picks it up whenever the LTE is available. Currently I am using Open Signal's widget to see what kind of bands it picks up.
Here are the original two threads:
Stock firmware (credits to Spectre51):
http://forum.xda-developers.com/showthread.php?t=1752345
"Guide" (credits to mingkee):
http://forum.xda-developers.com/showthread.php?t=2180828
Click to expand...
Click to collapse
Thanks, this is good to know because I am considering leaving AT&T and moving to T-Mobile.

help!
Who can help me recover bands and imei?

nguy3ntu4n said:
Who can help me recover bands and imei?
Click to expand...
Click to collapse
Where did you get the build at?

DEEE38 said:
Where did you get the build at?
Click to expand...
Click to collapse
I flash the JB 204. Then this error
http://forum.xda-developers.com/showthread.php?t=2273688

LTE T-Mobile
DEEE38 said:
It seems so. The original a authors of the threads are the ones to give credits to. I was simply asking how to enable LTE back after the international baseband flash. Everything works great! 1900 bands picks up really well for 1900 band reframed on T-Mobile. When I get into a zone with AWS1700/2100 it changes over pretty quickly. As for LTE, it picks it up whenever the LTE is available. Currently I am using Open Signal's widget to see what kind of bands it picks up.
Click to expand...
Click to collapse
I'm considering the Ion for my next phone for T-Mobile. So can you tell me are you happy with the LT28AT on T-Mobile? Are you getting 4G and LTE?

Related

[Q] Can I use a Korean note 2 in the US?

I recently purchased a galaxy note 2 in Korea and I would like to bring it back and use it in the states with AT&T. I read that 4g would not be compatible with the phone but 3g will work? I plan to use this phone for business and I realized the 1 is not designated as voicemail due to it being a Korean phone. Is there way to add this feature on? Are there any other features that I will not be able to use with AT&T? I realize I won't be able to watch tv on my phone anymore.
JelliK said:
I recently purchased a galaxy note 2 in Korea and I would like to bring it back and use it in the states with AT&T. I read that 4g would not be compatible with the phone but 3g will work? I plan to use this phone for business and I realized the 1 is not designated as voicemail due to it being a Korean phone. Is there way to add this feature on? Are there any other features that I will not be able to use with AT&T? I realize I won't be able to watch tv on my phone anymore.
Click to expand...
Click to collapse
Try to root it n install you custom software,Do your homework around the forms n find the stuff you need n support the developers? You won't regret it! !
Sent from my SAMSUNG-SGH-I317 using xda premium
Dnice25 said:
Try to root it n install you custom software,Do your homework around the forms n find the stuff you need n support the developers? You won't regret it! !
Sent from my SAMSUNG-SGH-I317 using xda premium
Click to expand...
Click to collapse
I don't want to root it and I prefer to keep it stock. I just need to know if the phone will work with At&t's 3g network. It would also be nice if i could fine a way to check my voicemail.
JelliK said:
I recently purchased a galaxy note 2 in Korea and I would like to bring it back and use it in the states with AT&T. I read that 4g would not be compatible with the phone but 3g will work? I plan to use this phone for business and I realized the 1 is not designated as voicemail due to it being a Korean phone. Is there way to add this feature on? Are there any other features that I will not be able to use with AT&T? I realize I won't be able to watch tv on my phone anymore.
Click to expand...
Click to collapse
Frequencies used on the AT&T Network (USA)
Frequency Protocol Class
850 MHz GSM/GPRS/EDGE 2G
1900 MHz GSM/GPRS/EDGE 2G
850 MHz UMTS/HSPA 3G
1900 MHz UMTS/HSPA 3G
700 MHz LTE 4G
1700/2100 MHz(AWS) LTE 4G
T-Mobile (USA)
850 MHz/1900 MHz GSM/GPRS/EDGE/UMTS/HSPA
1900 MHz GSM/GPRS/EDGE 2G (EDGE)
1700 MHz UMTS/HSPA/HSPA+ 3G/4G
1900 MHz UMTS/HSPA/HSPA+ 3G/4G
1700 MHz LTE 4G
If that's the international version Note II check and see what frequency's it supports,and compare to AT&T or T-Mobile's. International devices are not carrier locked
If it's a branded phone meaning you got it from your cellar carrier, It could be locked to that provider only.
If your using the unlocked phone, look up the specs on your device and see what it supports, if it matches up to the above frequencies you should be good
budco2000 said:
Frequencies used on the AT&T Network (USA)
Frequency Protocol Class
850 MHz GSM/GPRS/EDGE 2G
1900 MHz GSM/GPRS/EDGE 2G
850 MHz UMTS/HSPA 3G
1900 MHz UMTS/HSPA 3G
700 MHz LTE 4G
1700/2100 MHz(AWS) LTE 4G
T-Mobile (USA)
850 MHz/1900 MHz GSM/GPRS/EDGE/UMTS/HSPA
1900 MHz GSM/GPRS/EDGE 2G (EDGE)
1700 MHz UMTS/HSPA/HSPA+ 3G/4G
1900 MHz UMTS/HSPA/HSPA+ 3G/4G
1700 MHz LTE 4G
If that's the international version Note II check and see what frequency's it supports,and compare to AT&T or T-Mobile's. International devices are not carrier locked
If it's a branded phone meaning you got it from your cellar carrier, It could be locked to that provider only.
If your using the unlocked phone, look up the specs on your device and see what it supports, if it matches up to the above frequencies you should be good
Click to expand...
Click to collapse
Ok so I got these specs for my svh-250k and looks like 3g will be compatible but it also picks up umts 2100 and att LTE frequency uses 2100 for 4g. Am I wrong? Do I need to look at the secondary cellular network?
SVH-250K
Cellular;Networks: GSM850, GSM900, GSM1800, GSM1900, UMTS1900 (B2), UMTS2100 (B1)
Secondary_Cellular_Networks: LTE850 (B5), LTE1800 (B3)
Should I sell my korean note 2 and purchase one in the states? I really would hate to get rid of my brand new amberbrown 32 gig phone and downgrade to a boring white or pebble blue 16gig phone. Decisions decisions.....
I'm in the same situation did you already go back to the states and try it out?
JelliK said:
I'm in the same situation did you already go back to the states and try it out?
Click to expand...
Click to collapse
This thread is nearly 5 months old, and the OP only posted 4 times in this thread....total...
You will likely not get an answer from the OP...
Do a general search for info on the Korean note threads...as we have 4 or 5 that may help you in getting your answer....
Good luck to you....g
JelliK said:
I'm in the same situation did you already go back to the states and try it out?
Click to expand...
Click to collapse
Just reading the specs I would go with T-Mobile, Faster HSPA speeds if you decide to keep your amber brown. Only downside is T mobile's coverage isnt as good as AT&T but if you re in a major city it shouldnt be a problem.
Good luck!

[Q] GSM/HSDPA/LTE bands for T-Mobile S4 (SGH-M919)

Hi there,
Can anyone confirm for sure and tested the following question:
How many bands for GSM, HSDPA and LTE does the T-Mobile Galaxy S4 (M919) have? Are they the same bands as the International S4 LTE (I9505)?
Based on the wikipedia page for Samsung Galaxy S4, the model I9505 has more LTE bands than the T-Mobile M919 version, is that completely true and technically proven?
Most of the websites state that the M919 and the I9505 has the same bands for all GSM, HSDPA and LTE.
I appreciate if someone can lead me to the ultimate answer.
Thanks.
Tmobile uses AWS for 4g LTE which requires 2100/1700 frequency. The GT-i9505 only supports 2100mhz i believe, which is not enough.
I think the GT-i9505 supports one of the several frequencies that Tmobile uses for HDSPA, so HDSPA coverage may be a bit spotty with the phone. This was referenced off the top of my head, but I had done some research online about this before as I had similar questions as you.
Please read forum rules before posting
Questions and help issues go in Q&A and Help section
Thread moved
Thank you for your cooperation
Friendly Neighborhood Moderator
Here's an article on the frequencies that just came out that may help you OP.
tikoracer said:
Hi there,
Can anyone confirm for sure and tested the following question:
How many bands for GSM, HSDPA and LTE does the T-Mobile Galaxy S4 (M919) have? Are they the same bands as the International S4 LTE (I9505)?
Based on the wikipedia page for Samsung Galaxy S4, the model I9505 has more LTE bands than the T-Mobile M919 version, is that completely true and technically proven?
Most of the websites state that the M919 and the I9505 has the same bands for all GSM, HSDPA and LTE.
I appreciate if someone can lead me to the ultimate answer.
Thanks.
Click to expand...
Click to collapse
You can find all the information on the Wiki page: https://en.wikipedia.org/wiki/Samsung_Galaxy_S4
I9505 lacks the 1700MHz LTE band which is needed in T-Mobile LTE.
That's weird, I can swear that wiki page had different information yesterday about the I9505 LTE bands
macaumen said:
You can find all the information on the Wiki page
I9505 lacks the 1700MHz LTE band which is needed in T-Mobile LTE.
Click to expand...
Click to collapse
Hey so looking at the wiki that you guys posted up there it says following for the tmobile version: 700 MHz (Band 17), CLR, AWS, PCS, IMT, IMT-E
now i somehow got my hand on one of these devices in europe for rather cheap and totally new, so im confused now what these CLR, AWS, PCS, IMT, IMT-E are, does any of these stand for any other than the 700mhz band? like 1700/1800mhz? or in other words, is it possible to get lte to work in europe with the tmobile usa s4? Can the modem perhaps be flashed with an i9505 one and than get the additional bands or is the hardware actualyl that different (as in antennas and amplifiers)?
Its not really a dealbreaker for me as LTE in my country is quite some time away but still, would like to know.
thanks
In simple words, the LTE bands are (not in order): Band 1 (2100), Band 2 (1900), Band 4 (1700), Band 5 (850), Band 7 (2600), Band 17 (700), so we have the LTE bands available for the T-Mobile version: 700, 850, 1700, 1900, 2100 and 2600.
crnkoj said:
Hey so looking at the wiki that you guys posted up there it says following for the tmobile version: 700 MHz (Band 17), CLR, AWS, PCS, IMT, IMT-E
now i somehow got my hand on one of these devices in europe for rather cheap and totally new, so im confused now what these CLR, AWS, PCS, IMT, IMT-E are, does any of these stand for any other than the 700mhz band? like 1700/1800mhz? or in other words, is it possible to get lte to work in europe with the tmobile usa s4? Can the modem perhaps be flashed with an i9505 one and than get the additional bands or is the hardware actualyl that different (as in antennas and amplifiers)?
Its not really a dealbreaker for me as LTE in my country is quite some time away but still, would like to know.
thanks
Click to expand...
Click to collapse
tikoracer said:
In simple words, the LTE bands are (not in order): Band 1 (2100), Band 2 (1900), Band 4 (1700), Band 5 (850), Band 7 (2600), Band 17 (700), so we have the LTE bands available for the T-Mobile version: 700, 850, 1700, 1900, 2100 and 2600.
Click to expand...
Click to collapse
sorry for asking it again, but that basically means the tmobile version has most bands that are used enabled? just have to figure what bands are being used in my country... thanks really
edit: checked the bands here naturally its 800 and 1800, so my question remains, can i somehow flash the phone to work on these?
Check the picture attached, this photo is from the original T-Mobile US Samsung Galaxy S4 (M919) box.
crnkoj said:
sorry for asking it again, but that basically means the tmobile version has most bands that are used enabled? just have to figure what bands are being used in my country... thanks really
edit: checked the bands here naturally its 800 and 1800, so my question remains, can i somehow flash the phone to work on these?
Click to expand...
Click to collapse
No, you can't flash a I9505 rom to a M919 device, if you do, you will brick it. The best option for you to get 800 and 1800 frequencies is to go for the GT-I9505, it's the Samsung Galaxy S4 LTE version, and it has the following bands for LTE Cat 3 (800 / 850 / 900 / 1,800 / 2,100 / 2,600 MHz). This is the official Samsung page: http://www.samsung.com/au/consumer/mobile-phone/mobile-phone/smartphone/GT-I9505ZKAXSA-spec
crnkoj said:
sorry for asking it again, but that basically means the tmobile version has most bands that are used enabled? just have to figure what bands are being used in my country... thanks really
edit: checked the bands here naturally its 800 and 1800, so my question remains, can i somehow flash the phone to work on these?
Click to expand...
Click to collapse
Yes, it seems that the I9505 has LTE bands for each region, it's not dedicated for America (North, Central and South), it also support Europe and Asia, while it doesn't contain most bands for a specific region, it's a world phone, unlucky doesn't fully support T-Mobile 4G UTMS network (1700/2100), but still a good option for those who travel to other continents.
sleik said:
Tmobile uses AWS for 4g LTE which requires 2100/1700 frequency. The GT-i9505 only supports 2100mhz i believe, which is not enough.
I think the GT-i9505 supports one of the several frequencies that Tmobile uses for HDSPA, so HDSPA coverage may be a bit spotty with the phone. This was referenced off the top of my head, but I had done some research online about this before as I had similar questions as you.
Click to expand...
Click to collapse
Flashing just the modem doesn't work either?
I haven't tried flashing modems into another devices that don't correspond to their own. I can't help you with that answer at this time
crnkoj said:
Flashing just the modem doesn't work either?
Click to expand...
Click to collapse
tikoracer said:
I haven't tried flashing modems into another devices that don't correspond to their own. I can't help you with that answer at this time
Click to expand...
Click to collapse
i asked that because i have an att atrix, on which its possible to flash european modems without a problem, thanks for your time man, i hope someone will try this and it works
Question...are all those other things i've been hearing about other ppl successfully getting 4g reception after doing something to either with the aws band's, or to the software true? does anyone know for sure? i'm very thankful for any input, as i've been hearing so many conflicting things when it comes to the i9505 and getting 4g service with t-mobile, i just want a proven answer :/
Sent from my GT-I9505 using xda app-developers app
Sent from my GT-I9505 using xda app-developers app
nycemc said:
Question...are all those other things i've been hearing about other ppl successfully getting 4g reception after doing something to either with the aws band's, or to the software true? does anyone know for sure? i'm very thankful for any input, as i've been hearing so many conflicting things when it comes to the i9505 and getting 4g service with t-mobile, i just want a proven answer :/
Sent from my GT-I9505 using xda app-developers app
Sent from my GT-I9505 using xda app-developers app
Click to expand...
Click to collapse
T-mobile is 4g lte and super fast
Sent from my SGH-M919 using XDA Premium 4 mobile app
crnkoj said:
Hey so looking at the wiki that you guys posted up there it says following for the tmobile version: 700 MHz (Band 17), CLR, AWS, PCS, IMT, IMT-E
now i somehow got my hand on one of these devices in europe for rather cheap and totally new, so im confused now what these CLR, AWS, PCS, IMT, IMT-E are, does any of these stand for any other than the 700mhz band? like 1700/1800mhz? or in other words, is it possible to get lte to work in europe with the tmobile usa s4? Can the modem perhaps be flashed with an i9505 one and than get the additional bands or is the hardware actualyl that different (as in antennas and amplifiers)?
Its not really a dealbreaker for me as LTE in my country is quite some time away but still, would like to know.
thanks
Click to expand...
Click to collapse
I bought my S4 T-mobile (SGH-M919) in USA. And it is fine working in Spain with 4G. But when i have upgraded it to Marshmallow then only works with HSPA(H+) as better. Change baseband? i am not sure to do it...mmmm

[Q] Use Unlocked SGH-I747 in Thailand on True Move 4G (2100mhz)?

Is there a way to check that the LTE radio on the ATT SGS3 will work with the 2100mhz band LTE in Thailand? I tried an updated SIM at the True Mobile shop this morning and my phone would not register on the LTE network. When selecting "Bearer" in APN settings, picking LTE would disconnect my mobile date - setting it back to 'Unspecified' allowed me back onto HSPA+ but not LTE.
- Is it possible for a carrier to restrict the types of phones that can access their LTE network, or is it as simple as having the correct radio?
- Are there different channels on the 2100mhz LTE spectrum, and is it possible ATT uses a different channel than True is using?
- How can I diagnose my radio connection to determine what could be preventing my access to LTE on the True network?
- What is the difference between LTE 700mhz Class 17 / 2100 and 2100mhz LTE?
ROM - SlimBean 7.2 weekly, stock kernel
MODEM - LK3
True Move Press Release - http://truemoveh.truecorp.co.th/news_events/news/entry/1392?ln=en
True LTE - 2100 mhz band 1
i747 LTE - 700 mhz band 17, 1700/2100 (AWS) MHz
- Is there a way to see if I am connected to their 850mhz 3G or 2100mhz 3G?
Please let me know what further information I can provide to facilitate a solution. Cheers and thank you in advance.
[EDIT] Upon closer inspection, these are loafers... er, rather I educated myself about LTE bands and AWS... a tad confusing, but going off of the Samsung website spects, the SGH-i747 is dual band LTE 4/17... which is incompatible with True's LTE band 1.
This may be the push that puts a SIV in my hands...

AT&T 2G/3G WorldWide [SOLVED]

Guys,
I bought an E980 (AT&T) and brought to brazil, unlocked it and its working great except for 2G/3G, just doesn't connect, I checked the frequencies and it's a match, my mobile operator (Claro) uses GSM 850-2G/2100-3G, are there any configurations/tests/flashings I can do for it to work?
G Pro - http://www.gsmarena.com/lg_optimus_g_pro_e985-5254.php
Thanks.
Sorry, meant to post in Q&A, Help & Troubleshooting.
One correction, my operator uses 1900 while AT&T 2100, but E980 is capable of 1900, I think it come disabled, can I activate it somewhere? Thanks.
AT&T doesn't use 2100Mhz. They use 850Mhz and 1900Mhz. 2100Mhz is mostly international like Asia and Europe. Check APN setting and also check *#*#4636#*#* if you're able to switch to HSPA/EDGE.
cproaudio said:
AT&T doesn't use 2100Mhz. They use 850Mhz and 1900Mhz. 2100Mhz is mostly international like Asia and Europe. Check APN setting and also check *#*#4636#*#* if you're able to switch to HSPA/EDGE.
Click to expand...
Click to collapse
Thanks for the answer cpro, but the solution was actually alot easier, I was configuring the APN as a VPN, after gotting it right it's working like a charm, 5MBPs downlink.

Sprint Note 4 LTE Bands

Hey guys,
I am in Malaysia and my phone operator uses 4G LTE on Band B7 2600. I can't find the proper list of bands for the Sprint version, can someone please clarify if I can use LTE or not?
Regards,
Zeekay.
Here you go: From the samsung web site:
http://www.samsung.com/us/mobile/cell-phones/SM-N910PZKESPR-specs
According to Samsung they do not support 2600 with this phone.
LTE: Band 25/26/41
800/1900 MHz (CDMA),
800/1900/2500 MHz (LTE),
850/900/1800/1900 MHz (GSM),
850/900/1900/2100 MHz (UMTS)
I don't know if there are hardware limitations that would prevent loading different firmware to enable band 7
Zeekayy said:
Hey guys,
I am in Malaysia and my phone operator uses 4G LTE on Band B7 2600. I can't find the proper list of bands for the Sprint version, can someone please clarify if I can use LTE or not?
Regards,
Zeekay.
Click to expand...
Click to collapse
People like me with unlocked sprint note 4's have been trying forever to unlock additional lte bands. But so far not possible! I have once found my phone on lte band 5, but don't know how it happened.
By default this phone only supports 25,26,41. Pic below.
I have found a hidden menu of lte bands but none work! Pic below.
Edit: @poit i didn't even see your post. Sorry, didn't mean to double answer!

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