Database Info

[Q] Locking Phone to WCDMA

I am having an issue locking the phone to WCDMA. I live an area where the EDGE signal is stronger and it constantly drops 3G. After rooting the phone, I locked it into WCDMA and it would stick all the time, even dropping all signal when I moved into an area with only GSM coverage. However, somewhere along the line, I've lost the abillity to lock it in. I have tried going into the Mobile Networks settings and selecting WCDMA Only and also doing the *#*#4636#*#* and neither one will lock it into WCDMA. Anyone else having this issue or know of a workaround for this?

If ur in a edge based area where 3g is minimal,then setting to wcdma is the worst way to go. Wcdma will lock u into 3g/4g signals ONLY! So if your in edge area only,wcdma will not give u data or signal due to the fact the phone is searching for 3g/4g signals only. And GSM or cdma is a different ball park. Set to wcdma preferred and let it pick up what it can. If a 3g or "4g" signal is avaliable,it will automatically detect it and connect.
Sent from my HTC Inspire 4G using XDA App

mattmiller said:
If ur in a edge based area where 3g is minimal,then setting to wcdma is the worst way to go. Wcdma will lock u into 3g/4g signals ONLY! So if your in edge area only,wcdma will not give u data or signal due to the fact the phone is searching for 3g/4g signals only. And GSM or cdma is a different ball park. Set to wcdma preferred and let it pick up what it can. If a 3g or "4g" signal is avaliable,it will automatically detect it and connect.
Sent from my HTC Inspire 4G using XDA App
Click to expand...
Click to collapse
Its not that I don't have 3G in my area, its just that it only gives me 3 bars as opposed to EDGE which will give me full signal. When it's set on wcdma preferred, it will connect to 3G and after a few minutes switch over to EDGE. With my Captivate and the Inspire when I first got it and before I rooted it, I was able to lock it into only 3G. Somehow after flashing basically every rom in this forum, I can't get that setting to stick anymore.

Ok then flash the ruu of the rooted stock inspire. It is a pd98img.zip u can load and flash via bootloader. It will stay s-off and will flash updated radio and patches. Get your data fixed and GPS and then flash a rom afterwards. Attn1 has it posted in the development.
Sent from my HTC Inspire 4G using XDA App

Rob_Wing said:
Its not that I don't have 3G in my area, its just that it only gives me 3 bars as opposed to EDGE which will give me full signal. When it's set on wcdma preferred, it will connect to 3G and after a few minutes switch over to EDGE. With my Captivate and the Inspire when I first got it and before I rooted it, I was able to lock it into only 3G. Somehow after flashing basically every rom in this forum, I can't get that setting to stick anymore.
Click to expand...
Click to collapse
Same issue here, I called AT&T and they said it's because the cell tower closest to my office is old and supports Edge only so my phone keeps attaching to that tower even though there are other towers in range (that will give me 3 bars of 3G) which are newer.
With the stock rom, even going into the testing menu and setting "WCDMA only", it kept me on the Edge network. I rooted and flashed a custom ROM (Android Revolution) and at first it was great. At the office I could force "WCDMA only" at my desk, when I went into the middle of the building or whatever I would just have no signal (which I was ok with).
Now with the newer versions of the ROM I could no longer force "WCDMA only"... And the OP basically ignores my questions when I ask. Something that worked fine, I flashed a new version of the ROM and it stopped working...doesn't take a genius to figure out it's probably something he changed in his ROM... Not to sound unappreciative of the developers here...they do great work. Just frustrating... >_<

[Q] HSPA Fallback

Hi everyone,
I was looking around and I read that the Nexus is suppose to fallback to HSPA when the LTE signal is weak or non-existent.
I was curious as to when the phone actually considers the LTE signal weak. In my room, I only get 1 bar on LTE (~115 dBm), sometimes losing the signal completely, however I have never actually seen it fallback to HSPA.
So my question is, when does the phone automatically switch from LTE to HSPA?
Thanks in advance!
Current setting on my phone:
LTE (Recommended) is selected as the "Preferred network type"
[LTE/GSM auto (PRL) in the hidden menu]

Yes it will automatically switch when you not in a LTE area.. Its not based on signal strength.. Its based on your area and the area without Lte must have hspa to work or it will switch to 3g or Edge if hspa is unavailable...
Sent from my Nexus 5 using XDA Premium HD app

As in previous reply, it only falls back if there is no signal. Sometimes signals are weak and connection drop. Your phone tries to connect back to LTE. Since LTE signals are still in the air, it wouldn't switch to HSPA. If you think you will benefit from HSPA compared to LTE, you can manually change it.

areazus said:
As in previous reply, it only falls back if there is no signal. Sometimes signals are weak and connection drop. Your phone tries to connect back to LTE. Since LTE signals are still in the air, it wouldn't switch to HSPA. If you think you will benefit from HSPA compared to LTE, you can manually change it.
Click to expand...
Click to collapse
Hey, thanks for the quick reply.
I guess now my question is, how long will the phone wait before it gives up on looking for a LTE signal and switch to HSPA?
I initially thought that the phone would fall back to HSPA if the LTE signal is too weak.
Thanks in advance!

T-Mobile LTE Issue

I have a LG Nexus 5 and i have a strong LTE signal in my area along side HSPA+ if i make a Phone call LTE drops and HSPA is activated while the phone call is over it goes back to LTE in 20 seconds or so.
However if i use data while on HSPA+ mode it seems it wont handoff to LTE seamlessly
Like if you're on Verizon using 3g streaming consistently (not pandora something consistent downloading/upload like tunein radio) it would secretly bump you back to 4G LTE without any problems and stream would continue without even you noticing
T-Mobile however on the other hand doesn't until you stop the data usage and then it bumps back up to LTE
test it out download Tunein radio and stream a station make sure you're on HSPA+/HSPA then while streaming go to a location with like full or best LTE signal. (I went to the mall and drove right under the tower and phone still insists HSPA+)
not sure whats going on here? the Network not telling the phone to handoff? or some internal network issue or an issue with my nexus 5
by the way i am stock android 4.4.2 no root or recovery or whatever
So my question is is there a way to fix this? or is this something i need to email John Legere about?

I have similar issues but for Verizon losing eVDO and going to LTE is probably because EHRPD is making the switch more seamless. However, when my phone switches from HSPA to LTE I drop down to GPRS for a few seconds.
Sent from my One X using xda app-developers app

T-Mobile, drops from LTE to 3G when making a call

Just wondering if this happens to anyone else. My N5 was originally on Sprint but just recently switched to TMO. I have noticed that when on the TMO network my phone will drop to 3G whenever I make or receive a call. As soon as the call is over it switches back to LTE.
If I put my Sprint SIM back in and use their network it seems to hold LTE while on the call.
This is not scientific and am basing this observation from the network signal indicator on the top status bar. And as far as I can tell it isn't affecting performance. More of a curiosity at this point.
Sent from my Nexus 5 using xda app-developers app

this is how its supposed to work. phone calls cant go through the lte signal(in this case, with tmibile) to the phone, so it drops to 3G(H).

LTE in it's current implementation is a DATA ONLY service so when you make voice calls it drops that connection and connects the call. Since 3G is Voice/Data it shows the 3G/H connection available to you at that time. When you hang up it goes back to LTE.
With Sprint it uses CDMA so theres no simultaneous option with that so LTE is kept alive in order to deliver data at the sametime.
All expected behavior as already mentioned

Thanks for the info. Makes perfect sense how that is explained. I am rooted and cleaned out some apps I don't want. I'm particularly careful to not mess things up and noticed the change in behavior on TMO. Wanted to make sure something I hacked for Sprint didn't FUBAR the connection.
Sent from my Nexus 5 using xda app-developers app

I noticed this too on ATT.
When in calls it drops to H .
Thanks for the explanation
Sent from my Nexus 5 using xda app-developers app

It is called CSFB (circuit switched fallback), which will soon be replaced by VoLTE (Voice over LTE), which will be a plain and simple SIP-controlled VOIP call using LTE as carrier. Not sure if current phones can and/or will be upgraded to be able to do VoLTE, or if todays LTE handsets are stuck falling back forever...

[Q] OnePlus One LTE BAND selection?

Is there a way to see and change the LTE BAND that my phone is on? Rogers support aws, 2600, 700. So I was wondering if I could manually change between them. The S5 has that option in the hidden menu, so I'm hoping I could do the same on this one.
Thanks.

The phone choose the band himself, if he don't find bands authorized by your phone company, he can't use them.

tonymtl said:
Is there a way to see and change the LTE BAND that my phone is on? Rogers support aws, 2600, 700. So I was wondering if I could manually change between them. The S5 has that option in the hidden menu, so I'm hoping I could do the same on this one.
Thanks.
Click to expand...
Click to collapse
*#*#46363#*#* > Phone information > Set Preferred Network Type > 'LTE/GSM auto (PRL)'
That's as far as you can get in telling it what network to operate on. It won't let you select specific bands (at least not stock). Mine was set to 'TD-SCDMA, GSM and LTE' out of the box (international version) and since I don't plan to use my phone in China anytime soon, it didn't make sense for the phone to waste resources searching for a TD-SCDMA (China's homebrew 4G) signal. Haven't noticed much improvement to my LTE signal though, still the weakest radio I've seen in a 'flagship' in a while.

Thanks.
I am also on Rogers.
Does that mean when I am on the phone, it will revert to EDGE instead of 3g by using the LTE-edge setting?

I have major issues with reception on this phone.
LTE Works Fine but the 3G/H+ signal is awful, absolute disaster on this phone. It is extremely, extremely weak. And I lose coverage often and over 50% of the times my calls go straight to voicemail because Rogers uses 2g/3g for calling. The phone can't drop back to 2G or 3G in time to receive calls when on LTE
Rly frustrating. Have tried playing with all the settings.

Same issue
hashim71 said:
I have major issues with reception on this phone.
LTE Works Fine but the 3G/H+ signal is awful, absolute disaster on this phone. It is extremely, extremely weak. And I lose coverage often and over 50% of the times my calls go straight to voicemail because Rogers uses 2g/3g for calling. The phone can't drop back to 2G or 3G in time to receive calls when on LTE
Rly frustrating. Have tried playing with all the settings.
Click to expand...
Click to collapse
I'm having issues with 3G H+ too. Dont know its CM issue or not coz I had nice H+ signals on Color OS...
Can't even use internet data. most of the time network drops after using internet for a bit.. Network just suddenly gone and after that it comes back with no internet. Internet comes back online after a while...
Really worried.. and annoyed coz can't seem to find any solve for this. Even Mahdi rom had this issue..