T-Mobile WiFi Calling & LTE Signal Tips for Z3 - Xperia Z3 Q&A, Help & Troubleshooting

For those of you having issues with WiFi calling try the following, it may or may not help you but probably worth trying:
1. Enable SIP ALG in your router
2. Switch to 5Ghz WiFi band especially if you live in an apartment or a Wifi congested area as 2.4Ghz band faces a lot of interference due to widespread usage as well as added interference from things like some Bluetooth devices and Microwaves. Only interference you may face on 5Ghz is possibly really old 5ghz cordless phones.
3. On the Z3 going to WiFi settings -> Advanced and select keep WiFi on during sleep (I keep it off but it may help)
4. Try disabling "Que Background Data" in Power Management (May alleviate SMS issues over WiFi)
5. Either disable Stamina mode or try adding your SMS/MMS app like Google Messenger to Whitelist.
6. For some it seems VoLTE is causing MMS/Calling issues so you may want to try turning it off and see if it improves the situation.
For those of you who have the 4G Range Extender (NOT the Cell Spot router), it seems it actually sometimes interferes with the 5Ghz band oddly enough.
For those of you who live in a 700 MHz (Band 12) area you can force the phone to use only Band 12 when in an LTE area, for better signal and improved battery. Band 12 has lower bandwidth though like 7-10 Mbps but I get Full signal vs the other LTE Bands where its 1-3 bars but higher speeds.
Dial in phone *#*#386#*#* -> You will enter Tech Mode -> go to the LTE option and disable bands 2 and 4.

Related

Any Way To Force Hsdpa Alone???

As the subject states, is there a way to force HSDPA alone on 3G enabled pocket pcs (using Polaris) without it going back to 3G.. a kind of way to keep data request on so that hspda wont go back to standby.
Thanks
I have same problem.
I live in HSPDA supported area, Kaiser gets full H bars etc, but my Kaiser keeps switching between GPRS, 3G and EDGE for some weird reason
Hi Guys,
You can't force your handset to only use HSDPA services. HSDPA will not be enabled until you start a large download or stream services that require higher bandwidth. The BTS (base station covering you) is informed by the controling switch when to give you an HSDPA bearer, this is triggered by your data throughput. If you are not downloading a large file etc then you will not be given an HSDPA channel. This decision is always taken by the RNC (controling switch) and cannot be forced
There are a few reasons why you might switch between 3G/HSDPA/EDGE etc. These are primarily based on RF conditions - if your received signal strength falls below a certain level (decided by the network planners) you will be forced to handover to 2G (generaly a stronger signal if you live on the edge of 3G coverage) Some networks also have load based handover enabled - therefore if you serving BTS is getting highly loaded it will then hand you over to 2G/EDGE and you cannot force this either. You can of cource force you phone to only lock onto the 3G network and ignore 2G, then you will always at least get a 3G bearer but this will not guarantee HSDPA service - this will only be given if you have good enough signal and if you are using enough throughput. Forcing to 3G will of course increase the amount of call drops you have as you will not be able to hop onto another carrier
Sorry guys!!
^^^That's funny, when I was in an HSPA zone with my Fuze the H stayed on all the time... For that reason, I think you must be incorrect. Sitting there doing nothing, transferring data, didn't matter, always showed H when it was available. This happened in Boston, Albany, and NYC... So it's surely not a fluke based on the area. My data usage at the end of the month wasn't ridiculous either, so it wasn't constantly sucking data for any reason.
bumps.. i would like help on this too coz i use my phone for tethering and it always lags coz when the connection stays idle it switches to 3G instead of remaining on HSPDA..
Im not sure if this wud do but u cud try .. open up dialer n dial *#*#4636*#*# -> Phone information scroll down and there's selection of network type .. try WCDMA only?
terry3386 said:
Im not sure if this wud do but u cud try .. open up dialer n dial *#*#4636*#*# -> Phone information scroll down and there's selection of network type .. try WCDMA only?
Click to expand...
Click to collapse
it is on that by default
Is possible to change modem software?
matcol said:
Hi Guys,
You can't force your handset to only use HSDPA services. HSDPA will not be enabled until you start a large download or stream services that require higher bandwidth. The BTS (base station covering you) is informed by the controling switch when to give you an HSDPA bearer, this is triggered by your data throughput. If you are not downloading a large file etc then you will not be given an HSDPA channel. This decision is always taken by the RNC (controling switch) and cannot be forced
There are a few reasons why you might switch between 3G/HSDPA/EDGE etc. These are primarily based on RF conditions - if your received signal strength falls below a certain level (decided by the network planners) you will be forced to handover to 2G (generaly a stronger signal if you live on the edge of 3G coverage) Some networks also have load based handover enabled - therefore if you serving BTS is getting highly loaded it will then hand you over to 2G/EDGE and you cannot force this either. You can of cource force you phone to only lock onto the 3G network and ignore 2G, then you will always at least get a 3G bearer but this will not guarantee HSDPA service - this will only be given if you have good enough signal and if you are using enough throughput. Forcing to 3G will of course increase the amount of call drops you have as you will not be able to hop onto another carrier
Sorry guys!!
Click to expand...
Click to collapse
am i correct to say that based on your explanation, switching from 3G to HSDPA is cell station controlled and not controllable via our handphone?

[Q] Is there a way to set the threshold for toggling between umts and gprs?

Hi!
This one is for simmodded users.
I ask for a way to set the threshold for toggling between uts and prs connections.
Often I experience the following: having uts with fair signal strength (3-4 bars) then, without leaving the same spot outside the q drops the 3g connection and starts a gprs connection (signal strength full).
If I force the uts connection I mostly get the weaker 3g connection reastablished. Problem with this settings: in areas where I won't have no 3g connection I have to manually switch back to auto setting.
So is there a way to modify the time of automatic connection switch, so I may have longer weak 3g connection before I drop to gprs?
The 4 answers!
Sent from my awesome XT897
I don't know such an app, only the manual way.
Theoretically you could use SmartActions to start an app change to 3G on good locations and change to 2G on bad locations.
However, I don't know such an app for this.
Maybe someone know a better solution.

2g / GSM CALLS Preferred 3g+ DATA

Do anyone know of an app to change the priority of which network to use.
I want VOICE - default to most reliable [2g] and only use something else if 2g unavailable [networks in UK are notoriously bad at cell tower hand off on 3g connections resulting is dropping calls while driving on motorways]
I want DATA - default to highest speed, fall back to lower speeds as normal.
My options are 3g only, 2g only, 3g preferred - not ideal

[SOLVED] 3G consumes more battery than LTE, how this happens?

Hello XDA Community!
When my new phone (Huawei P9 Lite Mini) is on 3G/2G auto network mode, it consumes more battery than LTE/3G/2G auto mode even mobile data off.
I do not understand how this happens? For example, while 3G consumption at overnight is %10-15; LTE is only %2-3. This problem is the same in daytime too. Mobile data is off, unneccesary services/apps disabled, and no extra application installed while this happens. I tried all "wipe/factory reset/update firmware/factory reset/wipe/no app install" procedures, enabling all battery saving options, but it did not work. This is a problem for me when I'm in non-LTE areas.
This problem occurs the same result in different locations. There was no problem with my previous phone and I use same nano sim card.
I tried the following but it did not work:
- Wipe cache, factory reset, wipe cache,
- Wipe data/factory reset over recovery menu,
- Update latest firmware, wipe data etc. again.
How this happens and where am I doing wrong? Thank you for your help, best regards!
EDIT: PROBLEM SOLVED!
I changed my mobile carrier (provider) and the problem is gone. This is very interesting! I worked for hours and days to solve the problem, but this problem is neither caused by the phone nor by the software...
WCDMA (aka 3G with support for 2G/Edge) is in always-on mode on most phones, because that's how you receive and emit phone calls and, for most phones, SMS (in some more recent phones, LTE takes care of sending and receiving SMS/MMS), so if you're in an area where 3G/2G reception is poor, your phone has trouble locking on a cell with enough power to maintain contact, hence the battery drain.
4G/LTE only works for data, and voice if you have VoLTE (Voice over LTE) enabled, but works on a on-demand mode, even with cellular data constantly enabled. In other words, the 4G modem on your phone will memorize the latest position and IP address the nearest 4G tower/cell allocated it, and connect to it using the memorized settings when you need it to.
Not so with 3G, where DHCP doesn't exist, at least not the way it does in 4G: it uses PPP (Point-to-Point Protocol), where an ad-hoc IP address is attributed to each new connection, based on a pool of existing addresses allocated to the tower and its owner (carrier) by the authorities.
UglyStuff said:
WCDMA (aka 3G with support for 2G/Edge) is in always-on mode on most phones, because that's how you receive and emit phone calls and, for most phones, SMS (in some more recent phones, LTE takes care of sending and receiving SMS/MMS), so if you're in an area where 3G/2G reception is poor, your phone has trouble locking on a cell with enough power to maintain contact, hence the battery drain.
4G/LTE only works for data, and voice if you have VoLTE (Voice over LTE) enabled, but works on a on-demand mode, even with cellular data constantly enabled. In other words, the 4G modem on your phone will memorize the latest position and IP address the nearest 4G tower/cell allocated it, and connect to it using the memorized settings when you need it to.
Not so with 3G, where DHCP doesn't exist, at least not the way it does in 4G: it uses PPP (Point-to-Point Protocol), where an ad-hoc IP address is attributed to each new connection, based on a pool of existing addresses allocated to the tower and its owner (carrier) by the authorities.
Click to expand...
Click to collapse
Thank you for your reply!
When I googled about 3G vs. LTE battery consumption, everyone says that LTE will consume more batteries. That's make sense on first thought. So what I've been through is very interesting to me.
I think about is there a problem with my phone's 3G antenna. (footnote: I don't know about that 3g and LTE antennas are same or seperate?)
But I understand that you say this is normal, right?
Edit: I found a forum that this problem may be due to the operator (carrier). I'm still investigating...
3G and 4G operate on basically the same principle: receiving and sending "information" via radio waves.
The difference lies in the frequencies each standard uses, the way the data sent over them is modulated and demodulated, and how handsets make and maintain connection, so if you stay in the same location, and set your phone to 3G-only, then switch Airplane mode on then off, it'll take your phone longer to reconnect to the 3G cell/tower with the strongest signal (not necessarily the closest to you), because it'll have to go through the whole getting-acquainted process again, whereas in 4G, it'll go straight to the "Hey, how do you do? Long time, no see".
Now, if your phone antenna has a problem, you could be standing a few feet from the tower, in line of sight, and still get a crappy to non-existent signal. How many bars are showing on your screen is just an indication of how well your phone is receiving the signal from the tower; it doesn't mean that this signal is consistent and steady, hence the bars coming and going in real time.
If I were you, I'd download and install the Hidden Settings app from the Play Store, and run it; there, you go to RadioInfo, and you'll get a lot of information about how your phone modem actually works. It's a bit technical, but it would give you an indication.
I will try and looking for a new carrier. Thank you again. See you.
I changed my mobile carrier (provider) and the problem is gone. This is very interesting! I worked for hours and days to solve the problem, but this problem is neither caused by the phone nor by the software...

Guide - Improve T-Mobile Signal Consistency

Like many others, I had a very inconsistent signal on Tmobile with my PH1. Issues included bouncing between LTE and LTE+ (especially after disconnecting from WiFi), and random drops to no signal (ie, LTE then nothing). After reading through many posts on XDA and Reddit, I believe I found a combination of settings that stabilizes the phone's handling of signal. Since implementing these changes, my signal has remained mostly on LTE+, and occasionally LTE - results were consistent with my OnePlus 3T.
*Note* These changes stabilized my signal. They have NOT improved my reception. Signal strength is still weaker than my 3T by approximately 5-10dBm. Download speeds on LTE and LTE+ are consistently slower than the 3T. However, I have not dropped any calls, buffered streaming audio or video, or been unable to browse/use data within apps.
Here is what I did:
1. Dial *#*#4636#*#* This will bring up the Testing menu. Select Phone Information and under Set Preferred Network Type select LTE only from the dropdown.
2. Go to Settings > Network & Internet > Mobile Network > Advanced. Toggle Enhanced 4G LTE Mode off then on. Set Preferred network type to LTE.
3. While still in the Mobile Network menu, Select Access Point Names at the bottom of the menu and create a new APN using the Android APN settings from here: https://support.t-mobile.com/docs/DOC-2090
That's it. I don't know if any one of these changes made the difference, or if it's the combination of all three, but my signal stability and usability have improved dramatically. I believe this is the best this phone is going to get - I doubt any software patches will fix what is probably an issue with the antenna. Hope this helps everyone on TMo with the PH1.
You're pretty much disabling LTE+ so you stop the device from bouncing between the 2 LTE types which then stabilizes the signal. This would also explain the slower speeds.

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