Database Users

Carrier aggregation and disconnects on Verizon

I have noticed in a couple of places my Nexus 6 on Verizon will drop its LTE connectivity briefly. For example, during 4-5 speedtest.net runs, it paused and eventually gave me the "network communication issues" message at least 2-3 times during those 4-5 attempts in one specific location where I know I've seen it have a weak band 4 signal but strong band 13 signal.
Then I read this article which talks about carrier aggregation, and noticed this paragraph:
Because it supports band 29, it has support for LTE-Advanced downlink carrier aggregation with bands 2 and 4 to improve downlink performance. It also supports downlink carrier aggregation with bands 2+13, 2+17, 4+5, 4+13, and 4+17. Curiously enough, none of these band combinations that aren’t associated with band 29 indicate “coverage bands” are supported as the primary component carrier (PCC). Instead, they are noted as secondary component carriers (SCC), as denoted in the format PCC+SCC. This means that in the event you move out of range of the PCC (which are bands 2 or 4 on this device), the network connection will drop and have to be re-acquired instead of seamlessly just switching off carrier aggregation. As long as the network re-acquisition is quick (less than one second), it isn’t a problem.
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Emphasis mine. I am coming from a Galaxy S4 which supports band 4 and band 13 but I'm not sure if it supported carrier aggregation or not. I know I never saw disconnects like this on it. Is this something that can/will be fixed? Or just something we have to live with if we're in an area with spotty band 4 but solid band 13 coverage? It would seem this would cause a disconnect EVERY time you enter a building since band 4 doesn't penetrate as well as band 13 and it'd flip over and cause a disconnect.

Enable 1700 band on 910c?

Is there anyway to enable 1700 AWS /LTE on the 910C using QPST?
I know a few phones have benefited from a QPST modification in the past.
I'm interested in the Exynos Note 4 and would like to use with tmobile however I wonder if there's a way to enable all of the tmobile bands to work to ensure 100% network phone & data coverage compatibility.
It seems the only issue tmobile has is the missing 1700 band for 3G aws, 4G aws & LTE.
Is there a way to enable the 1700 band on the 910C using QPST?
According to Tmobile....
tmobile said:
T-Mobile network coverage
Created by tmo_ian on Oct 16, 2012 8:55 AM. Last modified by tmo_kim on Sep 3, 2015 3:37 PM.
Voice over LTE (VoLTE)
VoLTE (Voice over LTE) allows you to place and receive calls on our LTE data network. Phone calls are connected with a clear and rich experience. You never know when you might need to check Facebook while talking to your mom and sharing your Mobile Hotspot with your friends. All of this, on our amazingly fast 4G LTE network. Here's some of the highlights:
Switch between 4G VoLTE and Wi-Fi without dropping a call!
Enjoy crystal-clear calls with our new HD Voice service.
Browse the web with speed while on a call.
Placing a call connects twice as fast.
4G LTE
T-Mobile's advanced 4G LTE network is smoking fast! With incredible speed, you can do more using our nationwide 4G LTE network. 4G LTE delivers up to 50% faster speeds then 3G. If you're in an area served by 4G LTE, you can expect blazing fast speeds because of our expanded capacity. Check out our coverage map to see all the places we have 4G LTE.*
Frequencies: Band 2 (1900 MHz), Band 4 (1700/2100 MHz), Band 12 (700 MHz)
4G (HSPA+)
With 4G, theoretical maximum download speeds range from 21 Mbps up to 42 Mbps. You can take advantage of incredibly fast download speeds, and even use voice and data services at the same time.
Frequencies: Band 2 (1900 MHz), Band 4 (1700/2100 MHz)
3G (HSPA)
With 3G, theoretical maximum download of 14 Mbps. With 3G, you can use voice and data services simultaneously.
Frequencies: Band 4 (1700/2100 MHz)
2G (GSM, GPRS, and EDGE)
EDGE, our enhanced 2G service, delivers a theoretical maximum download speed of 236 kbps. GPRS, our 2G service, delivers a theoretical maximum download speed of 114 kbps. Typical speeds are between 35 kbps and 45 kbps. Keep in mind, voice and data services cannot work simultaneously when on GPRS or EDGE.**
Frequencies: Band 2 (1900 MHz)
Requirements
It's important to use a device capable of the network type you desire, and you should be in a location that has cellular network coverage. Check out our coverage map to see what areas we service, and check out Phones & Devices for device specifications.
Data speeds vary depending on its operating system, processor, battery life, running applications, peak theoretical speeds, and distance from the cell site. USB laptop sticks almost always offer higher speeds than smartphones, because they use the power of a laptop with larger batteries, processors, and other technologies. Also, downloading information is faster than uploading. There is no way to predict an exact speed with so many factors affecting your experience.
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and the 910C specs seem to be:
Thetaylor310 said:
According to GSM Arena, the following LTE bands are set to work on the N910C (i have it too):
700/800/850/900/1700/1800/1900/2100/2600 MHz
(Bands 1, 2, 3, 4, 5, 7, 8, 17, 20) - N910F, N910C
And according to the providers' link given by B.Diddy, the major US LTE bands are the following:
Verizon:
- Band 4 (1700/2100 MHz)
- Band 5 (850 MHz)
- Band 13 (700 MHz)
Sprint:
- Band 25 (1900 MHz)
- Band 26 (800 MHz)
AT&T:
- Band 2 (1900 MHz)
- Band 4 (1700/2100 MHz)
- Band 5 (850 MHz)
- Band 12&17 (700 MHz)
T-Mobile:
- Band 4 (1700/2100 MHz)
- Band 12 (700 MHz)
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I have the same situation. Have you fix it for your 910C? What is QPST and what should I do? Thanks in advance.

Band 12 - T-Mobile

So I'm not the brightest with the different frequencies etc... What I do know is that Band 12 on T-Mobile has greater building penetration, and that it's currently not supported on the Nexus 6P, despite the phone having the band. My question is, what functionality do I lose? Aside from having more penetrating power, which gives me better signal, do I lose anything else? Honestly, I'm pretty sure Band 12 isn't even in Columbus, Ohio (where I am) yet... but I don't wanna buy this phone and then Band 12 go live here and then I lose LTE, if that's even what happens... or would it just resort to the current band 4?

Band 12
Powell730 said:
So I'm not the brightest with the different frequencies etc... What I do know is that Band 12 on T-Mobile has greater building penetration, and that it's currently not supported on the Nexus 6P, despite the phone having the band. My question is, what functionality do I lose? Aside from having more penetrating power, which gives me better signal, do I lose anything else? Honestly, I'm pretty sure Band 12 isn't even in Columbus, Ohio (where I am) yet... but I don't wanna buy this phone and then Band 12 go live here and then I lose LTE, if that's even what happens... or would it just resort to the current band 4?
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Thats trouble for you. From what I understand there is a long certification process to get the certification from T-Mobile, especially if they do not sell the phone. The Nexus 6 DOES support the T-Mobile band 12:
Unlocked devices
The following unlocked phones not only support LTE band 12 but all other bands required to be compatible with T-Mobile network (LTE bands 2, 4 and 12, HSPA+ on AWS and 1900 MHz, and GSM on 1900 MHz) however band support is not the only requirement. T-Mobile issued a statement regarding band 12 unlocked phones: All Band 12 LTE devices on our network must support VoLTE, E911. Currently only three unlocked phones supports VoLTE and band 12:
Nexus 6 XT1103 (US model)
iPhone 6s A1688 and A1633
iPhone 6s Plus A1689 and A1634

cc999 said:
Thats trouble for you. From what I understand there is a long certification process to get the certification from T-Mobile, especially if they do not sell the phone. The Nexus 6 DOES support the T-Mobile band 12:
Unlocked devices
The following unlocked phones not only support LTE band 12 but all other bands required to be compatible with T-Mobile network (LTE bands 2, 4 and 12, HSPA+ on AWS and 1900 MHz, and GSM on 1900 MHz) however band support is not the only requirement. T-Mobile issued a statement regarding band 12 unlocked phones: All Band 12 LTE devices on our network must support VoLTE, E911. Currently only three unlocked phones supports VoLTE and band 12:
Nexus 6 XT1103 (US model)
iPhone 6s A1688 and A1633
iPhone 6s Plus A1689 and A1634
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well tmobile has already confirm the 5x/6p will work on their network... im just wondering what the lack of band 12 support (for the time being), means for me. i assume i would continue to run on the band 4 that i do now.

Not sure if you've found the answer to your question or not. If you dont have Band 12 where you're located then its really a moot point. I'm in Phoenix and there is a TV station still operating on the 700Mhz Band 12 spectrum so I dont have it. However, if T-Mobile lights up Band 12 and these phones havent received their certification then they will not use Band 12 at all. That means you're limited to Band 2 and Band 4 LTE. Assuming you dont have Band 12 in your area (it appears you do not based on the de-facto map that most cite reference to is here http://www.tmonews.com/700mhz-lte-map/), your coverage will remain the same as it is now.
That being said, Google has stated that they are working with T-Mobile to have the 6p certified by the time the devices ship. So if that holds true, and T-Mobile rolls out Band 12 coverage in your area you should theoretically get better indoor LTE coverage since low-band spectrum travels farther and has an easier time passing through obstacles like block walls. Until then, you should have a similar coverage experience to what you have now. You're not "losing" anything to answer your question.

tmobile users

How is reception on T-Mobile? I'm used to flawless 6p service.

Pretty close to what I go with my Note 4 which was very good.
Sent from my ZTE A2017U using Tapatalk

Band 12 Support
huntnyc said:
Pretty close to what I go with my Note 4 which was very good.
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Are you in an area, or have you tried in an area with only Band 12 (700 Mhz 'Extended Range LTE') available? These are usually rural areas. (check the T-Mobile coverage map). My next phone must have good Band 12 reception and it would be great if someone could verify this for me with the Axon 7. Thanks.

Saw band 12 briefly in Brooklyn today around 74 dBm outside.
Sent from my ZTE A2017U using Tapatalk

((RayDar)) said:
Are you in an area, or have you tried in an area with only Band 12 (700 Mhz 'Extended Range LTE') available? These are usually rural areas. (check the T-Mobile coverage map). My next phone must have good Band 12 reception and it would be great if someone could verify this for me with the Axon 7. Thanks.
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Yes I've been in Band 12-only areas (Kremmling and Oak Creek, CO and surrounding areas) and the Axon 7 gets a fine signal. Comparable to my old Nexus 6 and 5X. VoLTE also works just fine. The Axon appears to not have too much trouble switching from roaming to band 12 native coverage, but occasionally if you drive through the band 12 area quite quickly the phone won't have time to notice (if you're on a roaming operator prior to hitting the B12 area). This is sometimes a problem here in the mountains as the topography inhibits all cell signals, including band 12, and in the case of both Oak Creek and Kremmling you can drive through the B12 area in under 5 minutes or so and the phone sometimes misses it totally and sticks to roaming. But of course, every phone has this problem to some degree.
But all in all I'd say the Axon 7 is on par with other devices I've tried vis-a-vis band 12 LTE.

I haven't run into any issues in my area

Doing better than my Moto X Pure 2015.

I get great signal and speeds in Indianapolis and the surrounding areas.

i was on 4 days tour. T-mobile reception was not good. many times there was no signal. few times it was on ATT roaming. i dont know it is Axon 7 or T-mobile network issue. (states i was visiting are PA,WV,NJ,MD,OH.)

LTE+ plus icon?

Here in Italy I got LTE+ icon with TIM carrier but the speed is almost the same reached in classic LTE: 25mb/s download speed.
The same SIM card used in S7 edge reaches 95 mb/s.
With VODAFONE carrier, instead, I ve never seen the LTE+ icon but just LTE and the speed is about 20-25 mb/s.
Anyone want to share his experience?
Thanks!

Anyone?

LTE+ or 4G+ is at lest a higher form of channel bonding. Try dial code *0011#, *2263# should have band selection,(note this may not always work but did on my note5) it should bring up tower info. Band 2 is [email protected] when LTE+ you will have like band 4 not sure it might be [email protected], this channel bonds to 30mhz with the 20mhz becoming download only vs 10mhz for download and 10mhz upload. The band 4 or whatever your carrier chooses (I have AT&T we use Band 2 and Band 4 as our top bonding, I set Band 2 as favored for default, best performance) becomes the upload only. This makes a + environment like HSPA vs HSPA+.

TechNyne66 said:
LTE+ or 4G+ is at lest a higher form of channel bonding. Try dial code *0011#, *2263# should have band selection,(note this may not always work but did on my note5) it should bring up tower info. Band 2 is [email protected] when LTE+ you will have like band 4 not sure it might be [email protected], this channel bonds to 30mhz with the 20mhz becoming download only vs 10mhz for download and 10mhz upload. The band 4 or whatever your carrier chooses (I have AT&T we use Band 2 and Band 4 as our top bonding, I set Band 2 as favored for default, best performance) becomes the upload only. This makes a + environment like HSPA vs HSPA+.
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unfortunatelly these codes don't work in italy...

Ive got a couple of questions and wondering if anyone can help.
Gsmarena lists the note fe as cat12, dose anyone know if cat9 would be supported a cat12 device?
Prior to doing any mods on my n935s, i was not getting 4G+ or the highest data speeds using the EE UK network. On my G935F with the same sim card id would get 4G+ and higher data speeds. Im pretty sure that is due to the fact the S7 was able to make use of 3 cell carrier aggregation. The G935F is CAT 9.
I have installed TWRP on my N935S and then installed the Note 7 BTU CSC to see if my N935S can make use of 3CA, however nothing interms of data speeds has changed. I dont think the phone allows the 3CA connection. I can see from the specs that all the nessacery bands are supported by the N935S.
Does anyone have any ideas?