Develop Bugs

[Q] Control H/3G/E/G switchover threshold

Can anyone explain how the Arc (or is it generic to android) controls the switch between HSPDA / 3G / GSM etc?
I live right on the edge of a HSPDA / GSM reception area, so sitting in the same chair I'm often browsing using "H", and then slowed down to "G" - and vice-versa. Unfortunately, every time it switches it seems (to me) that there is a lag while it establishes a connection again.
Is their any way to configure the ARC to make it attempt to stay with "H" for a bit longer?

Go to Setting - Wireless & networks - Mobile Networks and change the Network Mode into WCDMA
Hope that help you!
Sent from my LT15i using XDA Premium App

Changing from Edge(E) to Hspda(H) doesnt drop the connection but the from H to E does. Also if the H signal is weak, it will change automatically to E. If you are in a building , parking etc you will have à weak H signal since your phone is covered by the walls
Sent from my LT15i using XDA App

thank you both repliers.
It looks like there's no practical alternative to just letting the switch over happen as Sony have programmed it (or moving house).

You can try forcing to use GSM only or WCDMA only instead of GMS / WCDMA preferred.
The setting is under Wireless --> Mobile network settings --> Network Mode.
By forcing it to use WCDMA, the phone doesn't try to switch to GSM even when it has low signal. Good thing here is that, it doesn't try to switch between the two frequently hence battery might be saved and the bad thing about this is that, when you have a week signal, the phone tries to get better signal since it cannot switch to over to another frequency, hence the boosting uses more battery power.
Try it for yourself .

prathaban said:
You can try forcing to use GSM only or WCDMA only instead of GMS / WCDMA preferred.
The setting is under Wireless --> Mobile network settings --> Network Mode.
By forcing it to use WCDMA, the phone doesn't try to switch to GSM even when it has low signal. Good thing here is that, it doesn't try to switch between the two frequently hence battery might be saved and the bad thing about this is that, when you have a week signal, the phone tries to get better signal since it cannot switch to over to another frequency, hence the boosting uses more battery power.
Try it for yourself .
Click to expand...
Click to collapse
Hmm... Double Post huh?

r_southampton said:
thank you both repliers.
It looks like there's no practical alternative to just letting the switch over happen as Sony have programmed it (or moving house).
Click to expand...
Click to collapse
This is not only happening as programming by Sony but more likely by your operator. The operator defines the parameters that decide when they wish your mobile to switch from one network to the other, how weak they will allow the signal to become etc.
You can contact you operator, maybe they will log a case on it and investigate if the radio planning could be changed in your area.

[Q] Better WCDMA acquisition?

I was wondering if there is a way to make my tMob SGS3 do better at seeking and maintaining a WCDMA connection?
I know I can change the Mobile Network Mode to WCDMA only, and I do sometimes.
However, when it is in Auto mode, it switches back and forth constantly between GSM and WCDMA. In my home when I force WCDMA mode it has 2-3 bars of WCDMA and it does not drop the connection. When I put it on auto, it switches back and forth every minute or 2. I flashed and tried every modem possible but the results are the same.
Is there any way, besides WCDMA only mode, that I can make my phone more aggressively seek and keep WCDMA when it is available?
Thanks!

colorado_al said:
I was wondering if there is a way to make my tMob SGS3 do better at seeking and maintaining a WCDMA connection?
I know I can change the Mobile Network Mode to WCDMA only, and I do sometimes.
However, when it is in Auto mode, it switches back and forth constantly between GSM and WCDMA. In my home when I force WCDMA mode it has 2-3 bars of WCDMA and it does not drop the connection. When I put it on auto, it switches back and forth every minute or 2. I flashed and tried every modem possible but the results are the same.
Is there any way, besides WCDMA only mode, that I can make my phone more aggressively seek and keep WCDMA when it is available?
Thanks!
Click to expand...
Click to collapse
Dude I feel ya. I seriously think it all started once they switched to the 1900 band for 3g. Cause when I had my HTC HD2 it was mostly 3g in my house. Now it hardly ever switches to 3g unless I force it.
Sent from my SGH-T999 using Tapatalk 2

It works great when I switch it to WCDMA only, however I keep forgetting to switch it to GSM/WCDMA when I leave the house or work. I'm thinking of getting some TecTile NFC stickers to cause my phone to remind me to switch or maybe try to find a way to automate it with them or something.

If it sits at G or E until you start a data transfer and then jumps to 4G this is how it was originally set up to operate. The intent was to save both battery and banwidth. It was like this for me until I updated and it stopped. It was annoying so I'm glad it was changed. But if you are on either build UVALEM or UVALG1 try updating to the latest official build UVALH2.
Otherwise it may just be the tower you're connected to is under heavy load and is trying to conserve bandwidth, or it may just not be functioning correctly.
One other thing it could also be is if your area hasn't been refarmed yet. (It may be that this is what changed it for me but its been a while and I know I had updated about the same time I noticed it, so I attributed to that) the more I think about it now, if updating doesn't change its behavior, this is probably what's going on.
Sent from my SGH-T999 using xda app-developers app

colorado_al said:
i was wondering if there is a way to make my tmob sgs3 do better at seeking and maintaining a wcdma connection?
I know i can change the mobile network mode to wcdma only, and i do sometimes.
However, when it is in auto mode, it switches back and forth constantly between gsm and wcdma. In my home when i force wcdma mode it has 2-3 bars of wcdma and it does not drop the connection. When i put it on auto, it switches back and forth every minute or 2. I flashed and tried every modem possible but the results are the same.
Is there any way, besides wcdma only mode, that i can make my phone more aggressively seek and keep wcdma when it is available?
Thanks!
Click to expand...
Click to collapse
wcdma only.

DocHoliday77 said:
If it sits at G or E until you start a data transfer and then jumps to 4G this is how it was originally set up to operate. The intent was to save both battery and banwidth. It was like this for me until I updated and it stopped. It was annoying so I'm glad it was changed. But if you are on either build UVALEM or UVALG1 try updating to the latest official build UVALH2.
Otherwise it may just be the tower you're connected to is under heavy load and is trying to conserve bandwidth, or it may just not be functioning correctly.
One other thing it could also be is if your area hasn't been refarmed yet. (It may be that this is what changed it for me but its been a while and I know I had updated about the same time I noticed it, so I attributed to that) the more I think about it now, if updating doesn't change its behavior, this is probably what's going on.
Sent from my SGH-T999 using xda app-developers app
Click to expand...
Click to collapse
Thanks. I am on UVALH2. I think the way it is supposed to be setup is to sit on UMTS while conserving bat/data and switch to HSPAP when moving data (Both WCDMA protocols). It actually has been much better today. Don;t know if the tower in my area was having issues the last few days.
I checked for NFC programs that would allow me to change my networks based on location and none have that fine level of settings.
It isn't really a problem if I switch it to WCDMA only, it's just that I forget to switch it back to both when I'm on the road and I end up missing calls.

Well, I guess that answers whether it was the update that did it for me! I'm guessing it must be due to the network refarming then. Like I said, it did the same for me for a while, but I haven't had it hapoen at all for some time now.
You could look for an app that lets you create location based profiles. You can set it to be one way at home and when you leave it'll automatically change to your other settings.
I would imagine Tasker could handle this as well, but I've never used it.
Sent from my SGH-T999 using xda app-developers app

3G on T-Mobile via 1900MHz Band

I recently switched from AT&T to T-Mobile, and like the rest of us was suffering without 3G due to our lack of compatibility with the 1700MHz WCDMA that T-Mobile uses. One of my friends (a T-Mobile employee), however, informed me that it is indeed possible to get 3G by using the 1900MHz band, which T-Mobile is currently re-farming to support WCDMA. This trick is simple and easy, and I've had success with it thus far, albeit only in one location as of yet. There is a downside, however... as long as the trick is in place (as long as your phone is set to "WCDMA only" below), you cannot connect to EDGE. In other words, in an area where there is no 1900MHz 3G coverage, this process must be reversed to fall back to EDGE. As such, you may lose connection randomly and be completely unaware of it for hours, and I will mock you openly for attempting to blame me if you lose your job because you missed a call from your boss, lose your girlfriend because you stopped texting her, or lose your bacon because your remote bacon-protection app couldn't connect.
Remember, this is in the testing phase. It WILL get better over time and hopefully one day we won't even have to consider whether a phone supports 1700MHz... for now, though, report your findings below, preferably with location, signal strength/type, and down/up speed.
==PROCEDURE==​
Go to dialer and enter *#*#4636#*#*
In the menu that pops up, tap "Phone Information"
Scroll down to the menu labelled "Set preferred network type" (it should be the first one) - this will likely be set to WCDMA preferred
Change it to WCDMA only
Switch to your main Settings app, then navigate to "Mobile Networks" (under "More..." by your Wi-Fi and Bluetooth)
Tap "Network Operators" and wait for the search to complete
Tap T-Mobile if it appears in the list
Once the phone has acquired a signal, you can return the Network Mode setting to WCDMA Preferred. Your phone should now switch back and forth between EDGE and HSPA+ fairly reliably.
===My Results===​
At my home (approx. Colfax and Yosemite in Aurora, CO) I get 0-2 bars, mostly 3G but some H+ if I'm holding my phone and moving around, and 2-3 bars H+ if I set my phone down. Speedtest results range between 4 and 10 Mbps, with around 90ms ping. I've been keeping my phone set down with wireless tethering enabled, and it's been 100% usable thus far.
--Update--
Having used it daily for a few weeks, I'm pleased to report that there is moderate to good connectivity to at least 3G in most places. I still find myself on EDGE regularly, but I usually can get a WCDMA connection. Now, however, I'm annoyed because I exceeded 5GB data usage and am being throttled to below-EDGE speeds, which defeats the purpose of having 3G. >_<

what about AWS band ????/ its work

saqi4you said:
what about AWS band ????/ its work
Click to expand...
Click to collapse
Almost certainly not; see here.
If you have it working for some reason, go over there to tell everyone.

I'll test this later tonight. I'd be cool with 3G or H+ if it works. I have a T-Mob pay-by-the-day sim card that I'd like to use to tether my Nexus 7 to when I'm traveling (which is fairly rare).

I'm new to all this but how is this different from changing the APN settings?
Is this method better than changing APN settings?

This didn't work for me, Portsmouth, NH. It picked up the T-Mobile network in Network Operators but when I tried to select it it took forever and then said unable to connect, failed to register. Attempted a few times on a ucdlk3 stock based custom rom (Intergalactic II) and also on stock rooted.
Probably just not in a good location for this to work.
Sent from my Nexus 7 using xda premium

Possible to disable LTE on AT&T on AOSP ROM?

Is it possible to disable LTE on AT&T using an AOSP ROM?
I've tried the rat restriction method and the wap.cingular apn and neither worked.
Sent from my SAMSUNG-SGH-I747

phositadc said:
Is it possible to disable LTE on AT&T using an AOSP ROM?
I've tried the rat restriction method and the wap.cingular apn and neither worked.
Sent from my SAMSUNG-SGH-I747
Click to expand...
Click to collapse
No. Not yet anyway. So far the rat restriction works only on stock TW. As far as wap.cingular, I have noticed that it no longer works either. I think AT&T did something that seemed to disable it.

aybarrap1 said:
No. Not yet anyway. So far the rat restriction works only on stock TW. As far as wap.cingular, I have noticed that it no longer works either. I think AT&T did something that seemed to disable it.
Click to expand...
Click to collapse
AT&T effing sucks. They let iPhone disable LTE but not us? Makes no sense.
Sent from my SAMSUNG-SGH-I747

aybarrap1 said:
No. Not yet anyway. So far the rat restriction works only on stock TW. As far as wap.cingular, I have noticed that it no longer works either. I think AT&T did something that seemed to disable it.
Click to expand...
Click to collapse
My LTE toggle on CM10 works fine using the UCDLK3 modem (or whatever it is). The settings update from "WCDMA only" to "LTE/WCDMA/GSM" when I toggle it (just to confirm). I haven't updated to CM10.1 yet, but last I tested it the LTE toggle did not work.
On CM10, I did have to go into Settings and find the Mobile Networks option (its on the same page you enable Data Roaming) and select an AT&T network once. The toggle would not work if I selected "Select automatically". My phone is also unlocked using the dialer code that was posted for ICS 4.0 ROMs - not sure if this matters.

You can on AOSP.
System Settings> More> Mobile Networks
Now go to Network Operators, Might take a couple of minutes to scan, once a list shows up. Select the first option.
Now go back and choose the wap.cingular APN.
Also, if you want to get on 2G, the "Use only 2G Networks" is now able to be checked as well.
These options will reset after a reboot and toggling between Airplane mode.

AacidusX said:
You can on AOSP.
System Settings> More> Mobile Networks
Now go to Network Operators, Might take a couple of minutes to scan, once a list shows up. Select the first option.
Now go back and choose the wap.cingular APN.
Also, if you want to get on 2G, the "Use only 2G Networks" is now able to be checked as well.
These options will reset after a reboot and toggling between Airplane mode.
Click to expand...
Click to collapse
Interesting so you just have to do the network operator thing? I've gone into that menu before and tried to check 2g and it never let's me, but I've never gone into network operators section. Will try tomorrow!
Sent from my Nexus 7

AacidusX said:
You can on AOSP.
System Settings> More> Mobile Networks
Now go to Network Operators, Might take a couple of minutes to scan, once a list shows up. Select the first option.
Now go back and choose the wap.cingular APN.
Also, if you want to get on 2G, the "Use only 2G Networks" is now able to be checked as well.
These options will reset after a reboot and toggling between Airplane mode.
Click to expand...
Click to collapse
Good to know. Question though...does the wap.cingular APN still drop connections?

AacidusX said:
You can on AOSP.
System Settings> More> Mobile Networks
Now go to Network Operators, Might take a couple of minutes to scan, once a list shows up. Select the first option.
Now go back and choose the wap.cingular APN.
Also, if you want to get on 2G, the "Use only 2G Networks" is now able to be checked as well.
These options will reset after a reboot and toggling between Airplane mode.
Click to expand...
Click to collapse
Holy cow it worked broseph! I went into Network Operators. It took about 2 minutes to load the list, then showed three AT&Ts and a T-Mobile. I picked the first AT&T.
Then I tested 2g by putting a check mark in the force 2g box, and sure enough, it worked. I then chose GSM/WCDMA preferred, and sure enough, it forced HSPA+ without even having to choose the wap.cingular APN (in fact, I am using the "phone" APN).
Any downsides to selecting the network operator that way? I'm pretty sure AT&T does not roam onto T-Mobile in any event, so off the top of my head, I can't think of any downside. Would be curious if anybody can think of any downsides to forcing HSPA+ this way.
I personally will probably leave it on LTE most of the time anyways... I just wanted a method to force 2g or HSPA for the few times that I am in a location with weak LTE and the phone kills its battery by switching back and forth between LTE and HSPA. Awesome to finally have one.

AacidusX said:
You can on AOSP.
System Settings> More> Mobile Networks
Now go to Network Operators, Might take a couple of minutes to scan, once a list shows up. Select the first option.
Now go back and choose the wap.cingular APN.
Also, if you want to get on 2G, the "Use only 2G Networks" is now able to be checked as well.
These options will reset after a reboot and toggling between Airplane mode.
Click to expand...
Click to collapse
Isn't that what I said just above? Except you don't need to change APNs. Thanks for clarifying some of the menu options though.
phositadc said:
Holy cow it worked broseph! I went into Network Operators. It took about 2 minutes to load the list, then showed three AT&Ts and a T-Mobile. I picked the first AT&T.
Then I tested 2g by putting a check mark in the force 2g box, and sure enough, it worked. I then chose GSM/WCDMA preferred, and sure enough, it forced HSPA+ without even having to choose the wap.cingular APN (in fact, I am using the "phone" APN).
Any downsides to selecting the network operator that way? I'm pretty sure AT&T does not roam onto T-Mobile in any event, so off the top of my head, I can't think of any downside. Would be curious if anybody can think of any downsides to forcing HSPA+ this way.
I personally will probably leave it on LTE most of the time anyways... I just wanted a method to force 2g or HSPA for the few times that I am in a location with weak LTE and the phone kills its battery by switching back and forth between LTE and HSPA. Awesome to finally have one.
Click to expand...
Click to collapse
Yes, it works. I use this all the time. No need to change APNs either. I've never noticed any problems with this. Once in a blue moon I have to go and redo the network operator part but I've never figured out the exact reason. I have a MicroCell due to poor coverage so I often elect to turn off LTE at home and re-enable when I'm out and about. I've also traveled all over the country and never had an issue I would equate to me manually selecting the network operator.

romracer said:
Isn't that what I said just above? Except you don't need to change APNs. Thanks for clarifying some of the menu options though.
Click to expand...
Click to collapse
Haha yes reading back to your original post that is basically what you said. But since you didn't say "network operator" it didn't register for me even though it's now clear that's what you meant =P
Thanks for the help.

romracer said:
Isn't that what I said just above? Except you don't need to change APNs. Thanks for clarifying some of the menu options though.
Yes, it works. I use this all the time. No need to change APNs either. I've never noticed any problems with this. Once in a blue moon I have to go and redo the network operator part but I've never figured out the exact reason. I have a MicroCell due to poor coverage so I often elect to turn off LTE at home and re-enable when I'm out and about. I've also traveled all over the country and never had an issue I would equate to me manually selecting the network operator.
Click to expand...
Click to collapse
Thank you. Now I can finally have my "cake and eat it too". Did not even think to try these methods. Thank you for your information. This is so much easier than on stock rom...with the goodness of all that is AOSP.

I just did a test to see idle drain overnight on HSPA and it was actually worse than LTE. On LTE I drop about 7% overnight. Last night on HSPA I dropped 12% in 9 hours. Better battery stats showed 98% deep sleep, too, which is about the same as on LTE.
Anybody else ever try this? Curtis if those results are normal-i would have expected less drain on HSPA.
Sent from my SAMSUNG-SGH-I747

phositadc said:
I just did a test to see idle drain overnight on HSPA and it was actually worse than LTE. On LTE I drop about 7% overnight. Last night on HSPA I dropped 12% in 9 hours. Better battery stats showed 98% deep sleep, too, which is about the same as on LTE.
Anybody else ever try this? Curtis if those results are normal-i would have expected less drain on HSPA.
Sent from my SAMSUNG-SGH-I747
Click to expand...
Click to collapse
It actually depends on so much more than your data, there can be apps running in the background, bad signal, etc.

BWolf56 said:
It actually depends on so much more than your data, there can be apps running in the background, bad signal, etc.
Click to expand...
Click to collapse
My signal was about -70 dBm (ie, very good) and better battery stats showed 98% deep sleep.
In any event, it was running the same apps as it was the night before when it lost only 7% on LTE. I'm just surprised LTE idle drain was less than HSPA under identical circumstances and was wondering if anybody else experienced the same?
Sent from my SAMSUNG-SGH-I747

phositadc said:
My signal was about -70 dBm (ie, very good) and better battery stats showed 98% deep sleep.
In any event, it was running the same apps as it was the night before when it lost only 7% on LTE. I'm just surprised LTE idle drain was less than HSPA under identical circumstances and was wondering if anybody else experienced the same?
Sent from my SAMSUNG-SGH-I747
Click to expand...
Click to collapse
It could be coming from your carrier and their towers. If you really wanna save battery, set it to 2G overnight. Also, 4G is only a battery drainer when it's being used, which it isn't much overnight.

BWolf56 said:
It could be coming from your carrier and their towers. If you really wanna save battery, set it to 2G overnight. Also, 4G is only a battery drainer when it's being used, which it isn't much overnight.
Click to expand...
Click to collapse
+1. I set to 2G every night. Of course I also always have switched off data and wifi because I don't care about emails and other misc stuff while I sleep. I have slightly better 2G reception in my home than 3G or 4G so this helps even more on battery savings. Cut my battery drain nearly in half (6-8 hours I may get a 3% drain or an absolute max of 4% if I keep snoozing my alarm).

This doesn't work on my AOSP device, I cannot change Network Type or check the "Use 2G Networks only" box. What am I doing wrong?

AacidusX said:
You can on AOSP.
System Settings> More> Mobile Networks
Now go to Network Operators, Might take a couple of minutes to scan, once a list shows up. Select the first option.
Now go back and choose the wap.cingular APN.
Also, if you want to get on 2G, the "Use only 2G Networks" is now able to be checked as well.
These options will reset after a reboot and toggling between Airplane mode.
Click to expand...
Click to collapse
Wow this works
I think I've always been too impatient to wait 60 seconds for the network operators to load lol
But props im not sure if this is recently discovered but I've spent a lot of time searching for how to disable lte and could never figure it out.

Actually, got it to work. Picking the second "AT&T" from the network operator list allowed me to toggle the other settings. This is a big deal for me because my area has "partial" 4G coverage and my phone prefers a poor, slow 1 bar LTE signal over 5 bar HSPA+, thanks a lot!

wap.cingular will go in and out every 5 minutes and when i enable wifi and turn it off, it takes a good 1-2 minutes to regain connection. (On TW)

[Q] t mobile h+

Ive recently attained a captivate glide and unlocked it to use on t mobile. Like you would assume at first glance i had an edge connection. Although after messing around with it i realized by going to
Wireless and network > Mobile networks > Network operators >Default setup > Manual it gives me the option to choose to connect to att/ tmobile and when i chose tmobile and it registers on the network i get H+ speeds for a few minutes then it just defaults back to edge
is there a way i can keep my phone on H+ at all times because its capable

bump!

agchopz said:
Ive recently attained a captivate glide and unlocked it to use on t mobile. Like you would assume at first glance i had an edge connection. Although after messing around with it i realized by going to
Wireless and network > Mobile networks > Network operators >Default setup > Manual it gives me the option to choose to connect to att/ tmobile and when i chose tmobile and it registers on the network i get H+ speeds for a few minutes then it just defaults back to edge
is there a way i can keep my phone on H+ at all times because its capable
Click to expand...
Click to collapse
I have this problem too, but only into my house. Outdoor that´s right. I´ve tested with all modems, and I think the best for me is i927UCLH2.
Which rom, kernel and baseband do you use??

I´ve done some tests with my glide and my mother´s galaxy chat, in different places. In the street I have H+ and she H, but when we are into any house, under any roof, she still has H, and I only have E.
Does it happen to you?

shmemse when
mario_isp said:
I´ve done some tests with my glide and my mother´s galaxy chat, in different places. In the street I have H+ and she H, but when we are into any house, under any roof, she still has H, and I only have E.
Does it happen to you?
Click to expand...
Click to collapse
Doesn't this just sound like a basic signal issue? When the signal gets worse (indoor vs. outdoor) it will drop down to a lower signal.
Also, are you sure Tmo has fully rolled out the 1900mhz band in your area? They may not have complete coverage yet.

epsalmond said:
Doesn't this just sound like a basic signal issue? When the signal gets worse (indoor vs. outdoor) it will drop down to a lower signal.
Also, are you sure Tmo has fully rolled out the 1900mhz band in your area? They may not have complete coverage yet.
Click to expand...
Click to collapse
i'm sure that it is a phone or a software phone problem, cause i've put my sim card in my last phone (xperia pro) and it has H signal too
i've tested all rogers and att modems, and still have the problem..

Hi, I have a similar prob, I'm in the uk and need it to stay on H+, as it'll drop off to 2g in the house, I've always used miui roms in the past and they have the option to force 3g etc. The only way round this I could find is to use 'pimp my rom' which allows you to select which network you want manually, such as gsm, edge, wcdma etc. Download it, go to tools, device hidden menu, turn off radio, wait, turn radio back on, then quickly select from the drop down box what signal you want, I select wcdma only. If the radio does not come back on, put on flight mode then off again, and will work.. bit annoying but works..

That happen to me too, but not for t mobile, for a operator that use 1900mhz in my country.