Develop Bugs

Enable CA

hello,
I have Tmobile Galaxy Note 3 and would like to know if there is a way to enable carrier aggregation?
I really need this feature because I am headed to South Korea and Australia for 3 months on my research business trip. All carriers in those countries use Carrier Aggregation and in order to have service, I would need a device with carrier aggregation. I don't want to purchase another phone cause my phone is working fine.
Also, I have checked with the major carriers in those use bands compatible with my phone. I also know that Note 3 has snapdragon 800 3rd generation gobi LTE modem that supports this. So is there a way to enable that feature?

Anyone?

There is a way. I have a T-Mobile Note 3 and I've done it, though T-Mobile doesn't use CA yet, so I have no way to test it. Also, just so you know, Carrier Aggregation cannot combine any 2 LTE frequencies; it's specific pairs, like Band 2 and Band 17.
Anyways, my instructions are here: http://forum.xda-developers.com/showpost.php?p=57178013&postcount=80

Product F(RED) said:
There is a way. I have a T-Mobile Note 3 and I've done it, though T-Mobile doesn't use CA yet, so I have no way to test it. Also, just so you know, Carrier Aggregation cannot combine any 2 LTE frequencies; it's specific pairs, like Band 2 and Band 17.
Anyways, my instructions are here: http://forum.xda-developers.com/showpost.php?p=57178013&postcount=80
Click to expand...
Click to collapse
Thank you so much! I will look into it. T-Mobile does have carrier aggregation in Dallas, TX and Atlanta,GA, binding band 2 and band 4.

Just a minor change btw, you have to choose REL 10 if you didn't. It's actually not optional. Let me know if it works, because there's no CA here in NYC
The way to check if it's working is if you dial the same dialer code after that and go to Basic Information -> As Information.
If you see "CA Enabled but Not Configured", it means it's turned on on the phone, but not the towers you're connected to. If you see "CA Setting Wrong", do the steps over and turn on LTE REL 10. Otherwise, if it's on and working, you should see two frequencies listed. There are pictures on the next page in that thread showing what it looks like.
Sent from my SM-N900T using Tapatalk

Product F(RED) said:
Just a minor change btw, you have to choose REL 10 if you didn't. It's actually not optional. Let me know if it works, because there's no CA here in NYC
Sent from my SM-N900T using Tapatalk
Click to expand...
Click to collapse
Thank you so much ! It definitely works! Kudos +1

hhhh1973 said:
Thank you so much ! It definitely works! Kudos +1
Click to expand...
Click to collapse
Awesome I edited my above post to add more info on how to make sure it's working.
Can you post a screenshot of the AS Information screen just to make sure?
Sent from my SM-N900T using Tapatalk

Product F(RED) said:
Awesome I edited my above post to add more info on how to make sure it's working.
Can you post a screenshot of the AS Information screen just to make sure?
Sent from my SM-N900T using Tapatalk
Click to expand...
Click to collapse
It's not letting me attach the screenshot because I am a new user and need to be a member for at least a week. Optus 4G Australia is my carrier currently.
But it says:
CA enabled and configured.
Band 17 (5mhz)
Band 3 (15mhz)
R0 RSRP Band 3: -76, RSRQ: -4
R0 RSRP: -87, RSRQ: -7
EUpS: 4
AtReCo: 3, TaAtCo: 0 DeAtCo: 1.4rev99
Speedtest: 132mbps down and 39mbps up. Thanks again.

hhhh1973 said:
It's not letting me attach the screenshot because I am a new user and need to be a member for at least a week. Optus 4G Australia is my carrier currently.
But it says:
CA enabled and configured.
Band 17 (5mhz)
Band 3 (15mhz)
R0 RSRP Band 3: -76, RSRQ: -4
R0 RSRP: -87, RSRQ: -7
EUpS: 4
AtReCo: 3, TaAtCo: 0 DeAtCo: 1.4rev99
Speedtest: 132mbps down and 39mbps up. Thanks again.
Click to expand...
Click to collapse
Holy crap! It works! That's awesome! That's Band 1800 (Band 3) and Band 700 MHz (Band 17). Sorry, I just have one last question (I promise). This is 100% the SM-900T (T-Mobile US model?). What modem/baseband (Settings -> About Phone)?

Product F(RED) said:
Holy crap! It works! That's awesome! That's Band 1800 (Band 3) and Band 700 MHz (Band 17). Sorry, I just have one last question (I promise). This is 100% the SM-900T (T-Mobile US model?). What modem/baseband (Settings -> About Phone)?
Click to expand...
Click to collapse
Baseband is N900TUVUNENK3 running Android 4.4.2. I haven't rooted either.

[Q] ZE551ML at&t APN settings

I am not getting 4G LTE. It is staying on H (hspa). I have the one plus one and get LTE.
The info online says this phone should have all of the bands required.
Any ideas.
Thank you
This is the 4gb ram 64gb ROM version

jross3r said:
I am not getting 4G LTE. It is staying on H (hspa). I have the one plus one and get LTE.
The info online says this phone should have all of the bands required.
Any ideas.
Thank you
This is the 4gb ram 64gb ROM version
Click to expand...
Click to collapse
Check Settings - Mobile Network settings - Preferred Network Type and set it to LTE if you have this option and is not already set.
But I doubt that this is your problem. You bought the Taiwanese phone, didn't you? While OnePlus supports all ATT LTE bands (17, 4, 2), the Taiwanese Zenfone 2 doesn't support band 17 (nor ww model), which is otherwise typical for less inhabited aeries in the USA, but it seems that is widely used by ATT. Try the phone in the downtown or another city and you'll probably catch the LTE on other frequencies.

Yes I purchased it from Taiwan but all of the sites show so many bands for this phone. Asus does a terrible job with their model numbers. There are so many different versions with the same model number. There is a 4 g setting not lte and that is selected. I did pick up 4g while driving through part of the city.
Is there going to be a US model?
Thank you

Yes. There is a US model and its supposed to be released in the next month or so. The link below, click on specs, shows the LTE bands for each region. Clearly shows the Taiwanese model not having the 17 band.
http://www.asus.com/Phones/ZenFone_2_ZE551ML

That stinks. I took that page as it will work in all of these markets. Oh well
Thanks

jross3r said:
I am not getting 4G LTE. It is staying on H (hspa). I have the one plus one and get LTE.
The info online says this phone should have all of the bands required.
Any ideas.
Thank you
This is the 4gb ram 64gb ROM version
Click to expand...
Click to collapse
Where in US are you?

There are some areas in the US that are only on LTE band 17. I suspect that's OP's issue.

mrcamp said:
There are some areas in the US that are only on LTE band 17. I suspect that's OP's issue.
Click to expand...
Click to collapse
I looked at it and TW, WW and US all have 1700 bands if that's what you are referring to. If not can you shed some light?

lordpipa said:
I looked at it and TW, WW and US all have 1700 bands if that's what you are referring to. If not can you shed some light?
Click to expand...
Click to collapse
The topic is about bands not frequencies. There is nothing such as 1700 LTE band. Actually both USA and TW phones work on approximate LTE 700 MHz but bands are different because uplink and downlink are different. So TW model works on band 28 and US one on 17.

piskr said:
The topic is about bands not frequencies. There is nothing such as 1700 LTE band. Actually both USA and TW phones work on approximate LTE 700 MHz but bands are different because uplink and downlink are different. So TW model works on band 28 and US one on 17.
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Click to collapse
I see now. Tnx for the quick response. Hopefully I'm not outta luck when the phone arrives tomorrow from TW. Do you think that flashing later on a radio or baseband will solve this issue?

It's not that simple. Luckily Intel chip supports all LTE bands. But they must be activated in kernel too. Maybe someone will find the method to activate the missed ones. Otherwise you are not so bad. With TW phone you are short of only one LTE band of four major in the USA, Europeans missed 2 of 3.

piskr said:
It's not that simple. Luckily Intel chip supports all LTE bands. But they must be activated in kernel too. Maybe someone will find the method to activate the missed ones. Otherwise you are not so bad. With TW phone you are short of only one LTE band of four major in the USA, Europeans missed 2 of 3.
Click to expand...
Click to collapse
Thanks again for that. I see a bright future for this. Appreciate all this info. And definitely will see u around.

CT and work in long island NY. I hit 4g LTE on my way to work but most of the time have hsta+ which is not terrible.

I'm stuck with NO data on my Zenfone 2 with T-Mobile.

Bl00dRunzC0ld said:
I'm stuck with NO data on my Zenfone 2 with T-Mobile.
Click to expand...
Click to collapse
Check your APN settings.
Should be
fast.t-mobile.com
make sure the dash is in there.

alose said:
Check your APN settings.
Should be
fast.t-mobile.com
make sure the dash is in there.
Click to expand...
Click to collapse
Thanks that worked. I've always used fast.tmobile.com for my connection and never had issues until today. Now I'm happy and on 4g.

lordpipa said:
I see now. Tnx for the quick response. Hopefully I'm not outta luck when the phone arrives tomorrow from TW. Do you think that flashing later on a radio or baseband will solve this issue?
Click to expand...
Click to collapse
Frequency wise is matches everything AT&T needs, i just picked up my 4g/64gb TW model, i'll be playing with apn's to see if i can get lte to pop. Only getting H+ so far.
Correction, shipped with WW firmware, no 700mhz for us.

More - As posted above, this Taiwanese version is missing the LTE band 17. And there are some areas that this may be the only band available, so you will not have LTE in those situations.

Thanks so much.... I was having a heck of time here with my Zenfone 2 in Tucson AZ on T-mobile.... I was stuck on 2G... but updating the APN to fast.t-mobile.com and 2 reboots seems to have done the trick. So glad I don't have to EBAY this! THANKS AGAIN.... Loving this thing so far!

Well ****! This is where I am stuck win H+ on ATT.
No way around this huh unless someone does a new rom? Or is it hardwired?

Band Locking? Engineering Mode?

Hello everyone. I have a rooted Pixel XL on 7.1.1.
I can use the Network Signal Guru app to see the available bands but the locking option is disabled.
The internet told me to go to Engineering/Service Mode/Menu. The app Shortcut Manager Lite shows no such thing. I REALLY want to lock my band to a certain one as my phone always decides to choose the slow one. It's easy on Samsung phone or so I've heard. Did Google block this?
I don't mean the LTE only or CDMA/GSM selection. I mean the specific LTE bands. (For eg. 5,40) No Verizon. International unblocked version.
Cheers. Thanks.

Bump?
Also fun fact, my parents call the Pixel XL The Megapixel. Hehe.
Sorry for bumping.

Had the same issue with the Nexus 6P even after trying different radio versions with Cyanogenmod 13 and Android 7.1.X stock. On the Nexus 5X I didn't have any problems accessing the band locking option but I found this to resolve the issue on the Nexus 6P: http://www.trona-tech.net/network-signal-guru-on-nexus-6p/
I had to flash the "Engineering Radio" that I found using that link...perhaps one needs to flash the equivalent "Engineering Radio" on the Pixel to enable band locking with Network Signal Guru?

If you flash a custom ROM you can get band locking.

Fyi, on one of the official XL builds I was able to do the locking in that app. Haven't been able to in any of the last few builds. I told the developer but he wanted me to test and find what build/radio it was but I ain't got time for that.

GigabitEthernet said:
If you flash a custom ROM you can get band locking.
Click to expand...
Click to collapse
Thank you so much!!!
I finally got Pure Nexus and can lock bands prefectly!
Again, Thanks a lot!

s1dest3pnate said:
Fyi, on one of the official XL builds I was able to do the locking in that app. Haven't been able to in any of the last few builds. I told the developer but he wanted me to test and find what build/radio it was but I ain't got time for that.
Click to expand...
Click to collapse
What a useful post.

GigabitEthernet said:
What a useful post.
Click to expand...
Click to collapse
Lol it's not useful to know that it worked at one point on a stock rom build? You must not be very bright.

s1dest3pnate said:
Lol it's not useful to know that it worked at one point on a stock rom build? You must not be very bright.
Click to expand...
Click to collapse
More the fact a developer volunteered to resolve the problem and asked you for some information and you refused to help. You're the worst kind of user.

Great point. So all of us on this forum aren't using our phones as daily drivers and are willing and able to spend hours to flash various builds and radios and do testing and increase risk of bricking?
There are different levels of users on this forum you know.

ASimpleSock said:
Thank you so much!!!
I finally got Pure Nexus and can lock bands prefectly!
Again, Thanks a lot!
Click to expand...
Click to collapse
Great to hear! If you don't mind can you share your:
1) PureNexus Version
2) Radio/Baseband Version (perhaps the same radio from 7.1.1 stock?)
3) That you're still using the free version of Network Signal Guru you lock LTE bands?
Thanks!

LS1_01 said:
Great to hear! If you don't mind can you share your:
1) PureNexus Version
2) Radio/Baseband Version (perhaps the same radio from 7.1.1 stock?)
3) That you're still using the free version of Network Signal Guru you lock LTE bands?
Thanks!
Click to expand...
Click to collapse
Just see the screenshot.
1) 7.1.1-20170317-OFFICIAL
2) I got tired typing it. Find it in the image.
3) Yes I'm still using the free version from the Play Store.
Cheers!

Update.
I was in contact with NSG developer, he shared with me RC build, I tested and worked great.
And now update in Play Store ?
Band locking working great out of the box ??

mr-tical said:
Update.
I was in contact with NSG developer, he shared with me RC build, I tested and worked great.
And now update in Play Store
Band locking working great out of the box
Click to expand...
Click to collapse
When you say out of the box, you mean not rooted, right? If so, could you share the app? I really want to lock bands but don't want to root. Any other tips/feedback/suggestions would be appreciated!

mr-tical said:
Update.
I was in contact with NSG developer, he shared with me RC build, I tested and worked great.
And now update in Play Store ?
Band locking working great out of the box ??
Click to expand...
Click to collapse
Yes could you please share more info...are you using this app on stock rooted 8.1? Name of app? And would you happen to know what are the preferred bands? I'm on metro pcs using a tmobile apn if that matters...
Sent from my Pixel XL using XDA Labs

Out of the box, I mean install application and that's all
Not needed flashing modified radio.img etc..
Network Signal Guru, available in Play Store.
I'm rooted, stock 8.1, all working fine.
Which bands I prefer? It depends on the carrier and country.
Here in Poland (and probably most EU country's) LTE bands are 3, 7, 8, 20.
And the better band is the one that is less loaded and on which I have better speeds.
Just test it.
Sent from my Google Pixel XL using XDA Labs

mr-tical said:
Out of the box, I mean install application and that's all
Not needed flashing modified radio.img etc..
Network Signal Guru, available in Play Store.
I'm rooted, stock 8.1, all working fine.
Which bands I prefer? It depends on the carrier and country.
Here in Poland (and probably most EU country's) LTE bands are 3, 7, 8, 20.
And the better band is the one that is less loaded and on which I have better speeds.
Just test it.
Click to expand...
Click to collapse
Awesome...I hope someone chimes in and tells me the magic bands for my situation..the screenshots from that app look very confusing..if all else fails there's Google I reckon..
Sent from my Pixel XL using XDA Labs

AP2FTW said:
Awesome...I hope someone chimes in and tells me the magic bands for my situation..the screenshots from that app look very confusing..if all else fails there's Google I reckon..
Sent from my Pixel XL using XDA Labs
Click to expand...
Click to collapse
Look..You're in US so you need to look for US band on T-Mobile.
I've found this article:
https://www.phonearena.com/news/Che...on-T-Mobile-and-Sprint-use-in-the-USA_id77933
Based on this, T-Mobile US bands are 2, 4, 12, 66, 71**
**Rolling out in 2017.
T-Mobile
Finally, T-Mobile has been the loudest and arguably the fastest growing 4G LTE network, especially in the big cities.
2017 Update: T-Mobile has won a big 30MHz chunk of spectrum in an auction held this summer. The frequencies that it is now allowed to operate are in the low-band, 600MHz band, and are referred to as 4G LTE band 71. The new band 71 is rolling out to cities in Wyoming, Northwest Oregon, West Texas, Southwest Kansas, the Oklahoma panhandle, Western North Dakota, Maine, Coastal North Carolina, Central Pennsylvania, Central Virginia and Eastern Washington by the end of 2017. This is expected to boost its coverage by 6 million people to a total of 321 million Americans.
Currently, T-Mobile's main band is still band 4 (AWS) in the 1700 MHz range. Band 2 is used in markets where band 4 is not available, but the two are also aggregated for better coverage in markets, where both are available.
Band 12, on the other hand, is where a lot of T-Mobile's growth happens. While at the beginning of the roll-out in late 2014, few phones supported band 12, currently, most popular phones do and the increased penetration of the lower-frequency band makes it preferable.
Click to expand...
Click to collapse
But, I don't know if this tech spec is current.
Someone else from T-Mobile US need to confirm.
For example EU bands are not current, because based on this, in Poland we have bands 3, 7, 20 (1800, 2600, 800) but we stating to use LTE900 (band8) and also slowly starting LTE2100 (I don't remember which band it is).
So best for you is to test downloads speeds on your every band, just uncheck all in Network Signal Guru, leave only one, save and test download speed with some speed test app, back to NSG, select different band, save and test again and again and again...
Look for best band for your needs.

Verizon network.. Questions

So I have verizon in michigan.. instead of it saying verizon in the top left corner is says 31000... any ideas on that ? or how to change it?

The 5t is not compatible with VZW as it has no band 13. It may work but I think you'll have problems with that missing band.

Mike02z said:
The 5t is not compatible with VZW as it has no band 13. It may work but I think you'll have problems with that missing band.
Click to expand...
Click to collapse
Do you know that 13 band does?

Band 13 is the primary LTE band for Verizon. It also uses 14 and 2 but 13 is the primary band and you're going to have major problems without 13 on VZW or Sprint. See below...
https://www.phonearena.com/news/Che...on-T-Mobile-and-Sprint-use-in-the-USA_id77933

Mike02z said:
Band 13 is the primary LTE band for Verizon. It also uses 14 and 2 but 13 is the primary band and you're going to have major problems without 13 on VZW or Sprint. See below...
https://www.phonearena.com/news/Che...on-T-Mobile-and-Sprint-use-in-the-USA_id77933
Click to expand...
Click to collapse
ballllllllllllz.. stupid verizon needs to drop CDMA...

Yeah I have had the same issue with Oneplus in the past. Also, the UTC 11 didn't have band 13. Service was very spotty and LTE didn't work often. Sucks for us Michigan (at least Detroit metro) peeps because Tmobs and AT&T suck around here. VZW is so solid, but being limited to phones really hurts!!!!
Sent from my Pixel 2 XL using Tapatalk

No band 13 means???
Mike02z said:
The 5t is not compatible with VZW as it has no band 13. It may work but I think you'll have problems with that missing band.
Click to expand...
Click to collapse
Help a dummy out. Does the CDMA support mean the 5t can make phone calls and the lack of band 13 mean LTE performance will suffer?
If so, that sounds like my VZN supported phone.. It may not be a downgrade in service.

anySmarterIdRunLinux said:
Help a dummy out. Does the CDMA support mean the 5t can make phone calls and the lack of band 13 mean LTE performance will suffer?
If so, that sounds like my VZN supported phone.. It may not be a downgrade in service.
Click to expand...
Click to collapse
"Verizon Wireless was the first to arrive to the 4G LTE race and it has also built its nationwide network based on 700 MHz spectrum, but the primary band for Verizon is band 13. Bands 2 and 4 are used to strengthen the signal in the densely populated urban areas. One important thing to note about Verizon Wireless is that many phones are built specifically for the carrier, including its 4G LTE bands. In other words, the common case is that you will not be able to use an AT&T device on Verizon's 4G LTE network."
I've never tried my OnePlus 5t on VZW as the posts I've read said the phone is basically useless on VZW.

Verizon Band 4

Any reason why my Pixel 2 XL will not connect to Verizon's Band 4? I get all of the other bands, but not Band 4.

BuffLG said:
Any reason why my Pixel 2 XL will not connect to Verizon's Band 4? I get all of the other bands, but not Band 4.
Click to expand...
Click to collapse
How are you determining which band your on?
Not trying to be sarcastic, I am truly curious. I too am on Big Red, but couldn't tell you what band I'm on

@Badger50: Answer to your question is at https://play.google.com/store/apps/details?id=net.simplyadvanced.ltediscovery&hl=en_US
@BuffLG: Verizon's band 4 may be widespread but it is used to provide added capacity to the network. If the cellular traffic in your location isn't heavy enough, you may never see band 4 even though the P2XL supports it.

I use Signal check to see the bands. Or LTE Discovery.

Strephon Alkhalikoi said:
@Badger50: Answer to your question is at https://play.google.com/store/apps/details?id=net.simplyadvanced.ltediscovery&hl=en_US
@BuffLG: Verizon's band 4 may be widespread but it is used to provide added capacity to the network. If the cellular traffic in your location isn't heavy enough, you may never see band 4 even though the P2XL supports it.
Click to expand...
Click to collapse
Much obliged kind sir. I do know/remember that I'm usually on band 13, but was curious to know how to check it. Thanks again :good::good:

Lol with LTE Discovery it says I'm on ATT band 12, while signal check shows band 17.
Sent from my SM-G960U using Tapatalk

Signal Check Pro easiest way.
Band 13 is Verizon's original LTE band has furthest range (700 mhz spectrum). Band 4 (1700 mhz) and 2 (1900 mhz) are their AWS spectrum.
Band 2 also has the highest capacity. Usually deployed in the most congested areas first.
Band 2 will technically be the fastest. Will probably be the hardest to connect to, but if you're close enough to a tower and getting Band 2 service, you're golden. I've seen speeds close to 100 MBPS on Band 2

I'd bet a nickel you're not seeing band 4 because of this bug: https://issuetracker.google.com/issues/37136986

turboencab said:
I'd bet a nickel you're not seeing band 4 because of this bug: https://issuetracker.google.com/issues/37136986
Click to expand...
Click to collapse
Reading through everything, most people are having issues with T-Mobiles LTE band 66 showing up as band 3.

fiffan86 said:
Reading through everything, most people are having issues with T-Mobiles LTE band 66 showing up as band 3.
Click to expand...
Click to collapse
This bug is relevant on Verizon, AT&T and T-Mobile but not Sprint (I believe) as they don't have Band 4 and/or 66. T-Mobile turned on MFBI at least several months (maybe a year?) before Verizon and AT&T did.
Again I don't know for sure if it's related to what you're seeing but it does "smell" that way. Band 4 in the Phoenix area almost always shows up as a Band 2 EARFCN that Verizon doesn't own when using Signal Check Pro as it is being reported incorrectly by Android. The EARFCN is correct under the same conditions using Network Signal Guru since it reads directly from the Qualcomm chip.

BuffLG said:
Any reason why my Pixel 2 XL will not connect to Verizon's Band 4? I get all of the other bands, but not Band 4.
Click to expand...
Click to collapse
I always got band 4 until the last couple weeks .. I now get Band 3 instead of band 4 which seems to be faster if I get a strong enough signal.. Band 3 doesn't seem to be as strong a signal as Band 4 though.. Band 4 was always displaying as XLTE where Band 3 displays as LTE.. my old Moto Pure still gets Band 4 so I really don't understand why the Pixel no longer will get it! Got to be by design by Verizon, me thinks!!

The Wood said:
I always got band 4 until the last couple weeks .. I now get Band 3 instead of band 4 which seems to be faster if I get a strong enough signal.. Band 3 doesn't seem to be as strong a signal as Band 4 though.. Band 4 was always displaying as XLTE where Band 3 displays as LTE.. my old Moto Pure still gets Band 4 so I really don't understand why the Pixel no longer will get it! Got to be by design by Verizon, me thinks!!
Click to expand...
Click to collapse
That's the exact issue @turboencab is talking about. There is no Band 3 LTE in the USA. You are seeing Band 3 because of an Android OS/Qualcomm bug that cuts off EARFCN values above 65536. Band 4 can be "displayed" as Band 66 and most operators choose to do this now. Band 66 EARFCN values are above 65536.
Tldr; there is no Band 3 in the US. You are still connected to Band 4. Apps aren't able to display the correct band due to an OS bug.
Try to use CellMapper as a tool to see what you're connected to. The devs for that app can "correct" this issue based off some assumptions. https://play.google.com/store/apps/details?id=cellmapper.net.cellmapper