I have Samsung Galaxy S 4G with T-Mobile in San Francisco.
Whenever I go to an area without T-Mobile signal, the phone connects to AT&T. I called T-Mobile and they said that's because T-Mobile has roaming agreement with AT&T so my phone would connect.
The problem is, when my phone connects to AT&T, I can't make any calls. It says the phone's not registered. T-mobile says that's because I'm in an area that has T-Mobile coverage.
You'd think that the phone would be smart enough to figure out that only emergency calls can be made (which is what BlackBerry does and shows SOS sign). The real problem for me is that, I have WiFi calling enabled with cellular preference, and when I'm in the basement of my office building where there is no T-Mobile signal (but there is WiFi signal), my phone thinks it has cellular signal so it doesn't activate WiFi calling, yet no phone calls are coming in b/c it's not registered to AT&T's cellular network.
Is there a way for me to force my phone to only connect to T-Mobile? I know there isn't on the regular settings menu, but perhaps experts could tell me how to do so using those star-sharp keys listed here (http://forum.xda-developers.com/showthread.php?t=842134)?
Thank you!
Set wifi preferred instead of cellular.
Sent from my SGH-T959V using XDA App
Unfortunately, that doesn't work for me because I move around a lot, and Android WiFi calling feature doesn't have handover.
There's got to be a way to prevent this phone from connecting to AT&T at a low level somehow, no?
How do I do that? Have checked the manual but can't find location where explains how to select wi-fi preferred instead of cellular. Your kind advise will be appreciated
Open WiFi Calling and select settings. You'll see Preference. Select Cellular Preferred.
I think in setting then wireless and network, then mobile networks then network operators click the default settings.... select manual and wait for the carrier to pop up.
Will this solve your problem?
Sent from my SGH-T959V using XDA App
scoop_dtx said:
I think in setting then wireless and network, then mobile networks then network operators click the default settings.... select manual and wait for the carrier to pop up.
Will this solve your problem?
Sent from my SGH-T959V using XDA App
Click to expand...
Click to collapse
yep manual is exactly what OP should do.
if the settings for network operators are set to manual then u select the network u want and it sticks unless u manually select a different network provider. u are in select automatically mode so the phone can switch all on its own. this should solve your problem as other people have already mentioned
I have tried this many times and works as long you don't turn the phone off. After I forced the phone to manually select T-Mobile I checked many times the default setting and it remained in manual until the phone was turned off. When I switched it back on it was again in automatic mode and switching to ATT when signal is low.
Is there a way to prevent this? If not, well , first thing when phone is on in the morning is to check default setting.
5/24 I finally gave up and sold the phone. Samsung says they have not received any claims regarding this issue eventhough you see it frequently in the forums. I returned back to my HTC HD2 and will wait for the G2.
Related
The thunderbolt had this and it was nice.
Basically when I'm at work I'm in a fringe 4g area. If I leave the phone in 3g/4g auto mode then it constantly switches between the two and it destroys my battery. Not only that but it makes 4g basically unusable for me as it never stays on long enough to do anything with it.
On the thunderbolt by going into the phone info settings you could select LTE only mode.
On the Charge you only have the options of going CDMA only or CDMA/LTE auto. There is no LTE only option.
Is this something that can be corrected by an app or rom or kernel or is it built into the radio software?
I used the phone info app that worked great on the thunderbolt and on the charge it just comes up with a bunch of options like WCDMA only, GSM only and such and as far as I can tell none of them actually do anything.
Hopefully someone knows the answer to this because I like tethering to my tablets at work but if I can't have consistent 4g then I'm gonna be forced to return to my tbolt which is a shame because I like this charge alot better.
I haven't pucked up a Charge yet, but most Sammy phones let you for some fine grain tuning if the radio and other system settings via a menu accessed by a dialer code.
You could try *#*#197328640#*#* (is debug mode) and dig in from there.
Sent from Thunderbolt
distortedloop said:
I haven't pucked up a Charge yet, but most Sammy phones let you for some fine grain tuning if the radio and other system settings via a menu accessed by a dialer code.
You could try *#*#197328640#*#* (is debug mode) and dig in from there.
Sent from Thunderbolt
Click to expand...
Click to collapse
Already tried that, it doesn't work on the charge. It just dials and you get the "Welcome to Verizon wireless, your call cannot be completed as dialed" message.
I believe if you go settings ->wireless and network->mobile networks->system selection change it to CDMA mode will disable LTE.
you can try dialing "*#*#4636#*#*" that takes me to a hidden menu on the thunderbolt. If it works, from that menu select "phone Information" then select LTE only. or if you want to disable 4g (Helps battery in non 4g areas) you can select "CDMA auto(prl)"
thetwiztidfreak said:
you can try dialing "*#*#4636#*#*" that takes me to a hidden menu on the thunderbolt. If it works, from that menu select "phone Information" then select LTE only. or if you want to disable 4g (Helps battery in non 4g areas) you can select "CDMA auto(prl)"
Click to expand...
Click to collapse
Beat me to it
Sent from my ADR6400L using XDA Premium App
Thanks but did you guys even read my original post?
For starters, I'm not trying to disable LTE... I'm trying to force LTE only.
Secondly, as I previously said, This phone does not have the same radio options that the thunderbolt does. There is no option for LTE only. I understand the difference between CDMA auto PRL, CDMA/LTE auto and LTE only. THE PROBLEM IS THIS PHONE DOES NOT HAVE AN LTE ONLY OPTION!
I tried the phone info app that works on the thunderbolt, the only options are all for WCDMA only, GSM only and CDMA only and various combinations of them. There is no LTE only. Besides, none of the options present in that menu actually change anything, only the 2 that are built into the wireless network settings do (CDMA only and CDMA/LTE Auto).
Not trying to be a **** but if you're gonna post something to try and answer a question or help someone at least make sure you read the question.
In the same boat as you. I actually get decent service on LTE at home, and virtually nothing on 3G... go figure, but it keeps trying.
navycow said:
In the same boat as you. I actually get decent service on LTE at home, and virtually nothing on 3G... go figure, but it keeps trying.
Click to expand...
Click to collapse
i have the same problem as both you guys and this is so frustrating. when its connected to 4g i get between 8-10mb down. i also have a samsung mifi hotspot for verizon and it shows a strong 4g signal and gets over 10mb down consistently in the very same location.
i have no idea why my droid charge keeps switching between 4g and 3g. the funny thing is the only reason i really mind is because the 3g signal is horrible. if i was getting 2mb down on the 3g like i have seen at other locations i wouldnt mind at all.
yeah i have the same issue as well, i'm really not even sure what it's testing to decide to switch from 4g to 3g, i live about 100 yards from the verizon tower i'm connecting to and have full reception on both 4g and 3g but yet it still switches randomly between the 2, we really need a way to disable 3g
Sent from my Xoom using XDA Premium App
Still nothing on this front? I'm afraid I'm gonna have to return my charge tomorrow then =(
No LTE only mode = no 4g for me.
I already did and canceled Verizon, I'll have to stick with sprint. I really loved the charge, and wanted to keep it and stay with Verizon , but my evo gets a full 4g signal both at home and work. Too bad, the charge was an awesome phone
Sent from my SPH-D700 using XDA App
It actually seems to be the way android handles 4G, either on purpose or just coincidentally.
I have the same issue at work with Sprint, 4G gives me 2-3 bars but there is NO 3G, but it turns 4G off when the screen is locked, so it sits there trying to get backups in 3G all day, spare parts lets you force wifi to stay on, surely there should be a similar switch for 4G a dev could find.
Any luck on this issue here? I have a feeling I'm in a fringe area where it could potentially switch me between networks quite often...
Is it safe to assume that an LTE-only option is impossible unless Samsung does something to enable this functionality out of their LTE chip (CMC220)?
Any updates on a LTE/4G only option?
I found out how to force LTE Only ...
Warning! If this bonks up your phone, don't blame me!
Use at your own risk!
Now that we got that out of the way, here is what I have found:
Enable the Hidden Menu option by entering the following code in your phone dialer: *#22745927
Enter an SPC of: 000000
Select: Hiddenmenu Enable
Select: OK (Your phone may reset after this)
To get to the "Force CMDA/LTE/Global" menu, enter the following code in your phone dialer: **583
If you press the LTE button, you will be fixed on the LTE network.
Reset your phone
Taaa-daa!
Note: You apparently need connectivity to the CDMA network to make phone calls & text messages (Thanks, chaoscentral!) Oh, well ...
To reset back to the normal LTE/CDMA automatic selection mode:
Go to the "Force CMDA/LTE/Global" menu by enter the following code in your phone dialer: **583
Press the CDMA button, which will re-enable your phone to default to the CDMA network.
Reset your phone
When your phone boots back up, go to: Settings >> Wireless & network >> Mobile networks >> System selection >> LTE automatic
Cheers!
just keep in mind LTE only mode means no phone calls or text messages. since those go over CDMA
Ah, I should've guessed they would make the phone code for this hidden menu option "LTE". Now I wish there was a way to only disable EV-DO 3G (leaving CDMA intact for phone calls/texts). Can't have it all I guess...
Thanks for this regardless!
PeterDLai said:
Ah, I should've guessed they would make the phone code for this hidden menu option "LTE". Now I wish there was a way to only disable EV-DO 3G (leaving CDMA intact for phone calls/texts). Can't have it all I guess...
Thanks for this regardless!
Click to expand...
Click to collapse
Yep. I tried goofing around with a few different options on the "LTE" theme, but nothing came up.
Then, I realized that I had loaded new ROMs since the last time I had enabled the Hidden Menus option, and figured out that my Hidden Menus were no longer enabled. Once I re-enabled the hidden menus, I tried *#LTE#* (which didn't work), and then **LTE, which did.
BTW, for anyone that has had problems making phone calls after following my original settings, I have updated the post on to how to get back to automatic LTE/CDMA.
Also, has anyone tried that **583 "Global" option yet? Verrrry Interesting!! (But, spooky!)**
Ain't messin' with your phone fun?
** Anyone who gets this reference wins one "Bippy".
Hey guys, I recently unlocked and rooted my Infuse 4G from ATT
Im currently living in Panama and using CLARO, I got the correct APN settings,and everything, and the internet works.. "Sometimes" I have gone to the store to obtain help incase it was something on their network, but there is nothing wrong with the network, Next I tied Replacing my sim into my friend who just got the Galaxy S 2, And it worked fine.
The problem In my case seems to be That I cannot maintain a stable Data Connection, It keeps dropping and activating back randomly, if I reboot the phone it will bring data back to it 75% of the time.. but only for a short period.. maybe 5-10 mins at most, then it disappears again.
Im just wondering if anyone that is using the Infuse 4g in a foreign country has or is experiencing a similar issue, or if anyone can explain why this is happening and if there is a way to fix it.
Im waiting for Infused to come back up to put gingerbread on the phone and hopefully fix this issue.. but I fear it will require more.
To answer my own question I found a solution and testing a second
**Just want to add when I say toggle Softkey, I mean the button to the far left at the bottom**
Solution#1 to get Infuse 4G DATA working on Claro Network Panama:
Goto phone type *#*#197328640#*#*
Goto Debug-->PHONE CONTROL-->NETWORK CONTROL-->BAND SELECTION-->GSM BANDS-->GSM 1900-->Toggle Soft Key-->back-->toggle soft key-->END
This will give you a stable EDGE connection on the Infuse 4G
I will post a possible 3G fix after I have tested the setting for more than a day.
OK so Im pretty confident I got the 3G working now, if you experience this issue of losing Data on the network in other foreign countries to USA/CANADA this might help you out aswell.
**Just want to add when I say toggle Softkey, I mean the button to the far left at the bottom**
So again goto phone dial *#*#197328640#*#*
Goto DEBUG SCREEN-->PHONE CONTROL-->HSPA CAT CONTROL-->HSDPA DISABLE-->Toggle soft key-->Back-->toggle soft key-->END
If you followed my steps to gain access to EDGE you must do this also
DEBUG SCREEN--> PHONE CONTROL --> NETWORK CONTROL -->BAND SELECTION --> AUTOMATIC --> TOGGLE SOFT KEY --> BACK--> TOGGLE SOFT KEY --> END
so that you can access the other bands for 3G
Hope this helps people.
Also Would like to Add that Im using INFUSED v2.0.4 http://forum.xda-developers.com/showthread.php?t=1220088
and I switched to the ROGERS MODEM http://forum.xda-developers.com/showthread.php?t=1173704
With these settings applied.
The other way around this is if you install the Infused ROM it'll give you the option to manually lock to the network. The AT&T ROM has ATT roaming partner preference built in... super annoying, but is what it is. I had issues where putting in a foreign SIM I could only attach to networks AT&T had roaming agreeements with even though it wasn't an ATT sim and the non-ATT stock ROM solved it for me.
I saw network locking also in the debug menu, is that what you are talking about?
I cannot find any network locking within the normal menus.. if there is could you guide me to it please.
well I tried the lock via the debug menu.. and did not work when I enabled HSDPA.. maybe the issue isnt a foreign carrier issue or combination of a foreign carrier or just the fact that its a carrier that offer 4G but only on contract.
I was speaking to a friend last night, and he said when he was in the US he was experiencing a similar problem with ATT and the people at ATT said the phone will experience these issues on networks that have the ability of 4G or the HSDPA+ higher speeds since we know that its not real 4G.. so the phone attempts to connect or do whatever it does to obtain those higher speeds of HSDPA+, but is being refused by the network because you need to be on contract or have it enabled.. which then in turn causes it to disconnect all together from the data network.
So it made sense to disable to the HSDPA in the scenario.. I might add that by doing this on CLARO you do not get the full 3G experience its slower from about 2Mbit down to .50 Mbit but its still better than edge. and the HSUPA works fine with a 2Mbit Upload.
Im going to obtain a contracted SIM today with 4G enabled.. and remove all the steps I listed above to confirm that this is actually case.
I will post my results when I get the chip.
Hello fellow S3ers! I am David and I am new here.
I seem to be having a strange problem with my data network connection: My S3 is with Verizon and I have had it for several month now.
This morning everything was working fine down in FL and I hopped on a plane, set my phone to airplane mode, and returned to Philadelphia. After landing and disabling airplane mode, my phone refused to connect to any sort of data network - no 4G, 3G, or 1x. Calling and txting works fine.
I have been searching for a while now with no success. But here is the strange thing: I went into About Phone > Software Update, and clicked "Check now." Low and behold, the 4G icon flashed on and downloaded the latest update! (Which was over 140mb).
The phone updated and restarted, and now it says Software up to date. I saw the 4G icon flash on for a moment after the initial update restart, and then it flashed off. I went into software update again, and clicking Check Now caused the 4G icon to turn on again! It immediately turned off again, however. I was able to repeat this cycle several times, but now the Check now button does not turn the 4G back on at all - even for a moment as it did 10 minutes ago.
Any ideas how to solve this issue or what is going on?
Please let me know if I can provide you with any additional settings or details, but here are some details that may be relevant:
Mobile data: checked.
Network Mode: Global
APNs: None checked, EHRPD and LTE - Verison Internet are white, the rest are grayed out.
Mobile network type: LTE:14
Service State: In Service
Mobile network state: Disconnected
I appreciate your time.
I got the same issue, was working yesterday but today nothing. If I force it to cdma only I can get 3g data but it didn't stick around very long either...
Sent from my SCH-I535 using xda premium
northeast is having data connectivity issues at the moment- I called in and thats what support told me so most likely its the network right now and not your phone with the issue
http://forum.xda-developers.com/showthread.php?t=2183214
Thanks for the quick replies Neo and Chewwy.
Good news, 3G is now up on my device and it appears to be stable for the moment. No 4G yet, but I do have one more question just to make sure I didn't accidentally change something when I was troubleshooting it.
Network mode should be set to Global?
Should a specific APN be selected? Currently, both EHRPD - Verizon Internet, and LTE - Verizon Internet are white and selectable, however none seem to be checked with the little green dot. The rest are still grayed out. Is this normal, or should I select one?
Interesting to hear about the N.E. network issues. I suppose that makes me feel better lol.
I am new to the forums, so please go easy on me.
A quick back story....where I live, I have to use a Verizon Network Extender to make and receive calls & texts from home. VZW's Extender only works with 3G. Since the upgrade to 4.1.1, the mobile network menu only has choices of Global, LTE/CDMA and GSM.
Until yesterday, I have been using an app called Phone Info to manually set my mobile network to CDMA Auto (PRL) when I got home and it worked perfectly. Since the update, the Phone Info app no longer works and I cannot find an app that will allow me the same access to set my mobile network. I receive just enough of a 4G signal where I live that my phone will not auto switch to 3G. So now I have an expensive paperweight at home.
Can anyone point me to an app or tweak that could help me with this problem?
Thanks in advance.
Hello,
Does anyone know what I can do to lock my OnePlus 7 pro to T-Mobile? I live quite close to Canada and the phone always tries to connect to Rodgers or Bell. I tried going into mobile networks and unchecking the box to automatically choose a network operator and selecting TMobile, but it still tries to roam and I get no service.
After some research, I see there's an app that may help me: Network Signal Guru. It requires root, and I don't really want to go this route unless I have no other option.
Thanks in advance
quentin0 said:
Hello,
Does anyone know what I can do to lock my OnePlus 7 pro to T-Mobile? I live quite close to Canada and the phone always tries to connect to Rodgers or Bell. I tried going into mobile networks and unchecking the box to automatically choose a network operator and selecting TMobile, but it still tries to roam and I get no service.
After some research, I see there's an app that may help me: Network Signal Guru. It requires root, and I don't really want to go this route unless I have no other option.
Thanks in advance
Click to expand...
Click to collapse
Can't you go into the phone settings and turn off roaming?.
Open the phone app, three dots at the top, settings, all the way at the bottom, Sim and Network, Sim 1, turn off roaming in there.
bp328i said:
Can't you go into the phone settings and turn off roaming?.
Open the phone app, three dots at the top, settings, all the way at the bottom, Sim and Network, Sim 1, turn off roaming in there.
Click to expand...
Click to collapse
If I do that then I'm in the same situation with no bars, no data. I need to force it to connect to TMobile
quentin0 said:
Hello,
Does anyone know what I can do to lock my OnePlus 7 pro to T-Mobile? I live quite close to Canada and the phone always tries to connect to Rodgers or Bell. I tried going into mobile networks and unchecking the box to automatically choose a network operator and selecting TMobile, but it still tries to roam and I get no service.
After some research, I see there's an app that may help me: Network Signal Guru. It requires root, and I don't really want to go this route unless I have no other option.
Thanks in advance
Click to expand...
Click to collapse
Go to sim and network, tap on the sim you are using. Scroll all the way down, tap on Network operator, disable the option to choose automatically, it will scan for available networks, choose T-Mobile. Leave the option disabled. it should be it.