No LTE with sultanxda's CM11 - AT&T Samsung Galaxy S II Skyrocket SGH-I727

I borrowed the SIM card out of my AT&T 4G/LTE hotspot to see if I could turn my old phone into a hotspot. However, while it does connect to the network, it will only run in HSPA mode. I briefly got it to use LTE for about an hour, but the ROM was still randomly rebooting then, and I lost it on reboot. I did put the SIM back in the hotspot, and it does get 4g/LTE on that device, so it's not the SIM card or the service as near as I can tell.
I did try to use the *#*#4636#*#* menu, but it instantly reverts back to WCDMA preferred if I select anything other than unknown. The same happens if I attempt to switch to LTE in the mobile networks menu. I also tried setting the APN to AT&T Broadband (the APN used by the hotspot) as well as AT&T LTE. I found an older thread related to this, but there didn't seem to be a conclusion.
The only caveat here is that the SIM is only authorized for data, not voice or SMS.
Any ideas?

Related

[Q] Network mode cannot set to 3G

Just got my Nexus 5 today.
However, in Wireless&networks / Mobile networks / Network Mode, I can only set it as 2G or LTE but not 3G.
I am currently on b-mobile in Japan and my Nexus 4 works fine on the network.
Wondering is it some sort of bug of KitKat or is it somewhat related to the SIM card I am using...
seanyseansean said:
Probably the sim card. Mine gives me the option, but another n5 on a different network (o2/UK) doesn't.
Click to expand...
Click to collapse
hmm, in my case, I can see the 3G option, just that whenever I select the 3G option, the system would automatically reset it when I navigate to other page.
Is that also the case on your N5 with O2/UK sim card?
On the other hand, I will test my N5 on different sim card tomorrow.
I have the same issue. If I select 4g, the dot stays when I go back, but I only get a full bar 2g connection. If I select 3g and go back, no dot is there but I only get a 2g connection.
Sometimes this was solved in previous handsets by going into the service menu and selecting 3g/2g from there.
MarkMcLovin said:
I have the same issue. If I select 4g, the dot stays when I go back, but I only get a full bar 2g connection. If I select 3g and go back, no dot is there but I only get a 2g connection.
Sometimes this was solved in previous handsets by going into the service menu and selecting 3g/2g from there.
Click to expand...
Click to collapse
I also tried forcing the N5 to use 3G only (by going into the test menu with "*#*#4636#*#*" code) but it still does not work...
OK, so I tried the SIM cards from my colleges, and my N5 can connect to 3G without problem.
It's weird that my SIM card works perfectly well on N4 but NOT N5...
Did not experience such SIM card computability issue before...
httimchen said:
I also tried forcing the N5 to use 3G only (by going into the test menu with "*#*#4636#*#*" code) but it still does not work...
Click to expand...
Click to collapse
Works for me now. Went into that test menu and selected GSM/CDMA auto PRL and I now have 3g. Didn't have to reboot.
3G cannot set for Virgin UK Sim
MarkMcLovin said:
Works for me now. Went into that test menu and selected GSM/CDMA auto PRL and I now have 3g. Didn't have to reboot.
Click to expand...
Click to collapse
I am also having the same problem, purchased the Nexus 5 from carphonewarehouse, can set on 4G or 2G, but when i set to 3G and comeback, it resets. Is that a SIM card problem? I tried to go on testing mode and apply GSM/CDMA auto PRL, that also not working. Is that a KitKat bug?
Same problem on Orange/EE in the UK. I can see the 3G option but phone won't let me change to 3G. Option never sticks. Just stays on 2G. Any ideas? Is this a known bug?
Thanks 101
101_North said:
Same problem on Orange/EE in the UK. I can see the 3G option but phone won't let me change to 3G. Option never sticks. Just stays on 2G. Any ideas? Is this a known bug?
Thanks 101
Click to expand...
Click to collapse
i think it's not a bug.i think it's a hardware problem. i'm having it with vodafone italy.
Same here on T-Mobile Austria :/
Already changed SIM card, without success. Maybe provider related issues?
unexist said:
Same here on T-Mobile Austria :/
Already changed SIM card, without success. Maybe provider related issues?
Click to expand...
Click to collapse
I'm on straight talk TT&T with a new SIM card, but sometimes the network mode doesn't stick. No idea why...
replaced a new 3G SIM, no luck
Just replaced a new 3G SIM Card didn't work the 3G option for me - Chunghwa Telecom Taiwan.
But I can select 2G, and dial number to make a phone call, so the SIM slot seem works fine, maybe just configuration issue?!
And, also I find a very annoying defect of my Nexus 5 32G(White), when hard-reset or flash to Factory Image, my Nexus 5 32G white goes crazy!! it just keep stuck and loop at Google Logo (not even show the 4 circle animation), and won't boot at all!
And I finally find a way to make it boot, by keep trying repeat flash factory, erasing userdata, erasing cache etc. is every had this issue?
EE/T-Mobile (uk) and I can't select 3g either, well I can but it doesn't stick.
I have a similar problem, except I can only select 3G / 4G, and not 2G because the 2G option isn't even displayed!! So infuriating. It still works through the *#*#4636#*#* menu, if I select GSM only then it does indeed go to 2G.
Is it possible that the SIM is somehow telling the phone OS it can't do 2G only? This didn't happen with my old carrier (same phone, only just switched). I have a feeling it's caused by the same thing that makes my phone number show up as 'unknown' now, too.
I have the same issue, I tried two different SIM, on is a Straight Talk sim that is set up to use the ATT network and used a T-Mobile sim card, both were unable to keep 3G as a setting.
My Nexus 5 seems that reluctant to drop from 3g to 2g when 4g is selected i have given up and now just manually select 2g to make sure i have a signal (im out in the sticks a bit). Sat at the PC with 4g selected i get no signal whatsoever, with 2g selected i get an indicated full signal strength.
Why on earth the N5 is so reluctant to dip its toe in the 2g territory when no data is on is beyond me.

Not automatically registering on network (CM 12.1) (VirginMobile UK)

Hi, I'm on CM 12.1 and my OPO won't register on networks at boot (I'm on Virgin UK). I have to manually go to Mobile Networks > Network Operators and select EE (which is a network Virgin uses). After that everything works fine, I have network and data. But if I connect to WiFi, data will be lost when I disconnect and won't come back unless I manually register to the network again. Also, network will drop much more often since I only use EE and the phone won't automatically connect to other networks. If I go to Mobile Networks > Network Operators > Choose Automatically the phone disconnects from network and I get "Emergency Calls Only".
NOTE: The SIM works in another phone without problem. However, my other SIM works perfectly fine in my OPO.
CONCLUSION: My guess is that the settings for the Virgin SIM failed to download correctly. I had to manually add the Virgin APN to use data (which I usually don't have to).
QUESTIONS: Is there a way to reset the SIM settings stored on the phone without factory resetting? I might be wrong, any other ideas on how to solve my problem?
Thanks, Dan

Please help! No 3G or GSM, can't call, but LTE works fine.

I really need help with my device, I searched all over XDA and no-one seems to have the same issue as me.
Here is some information:
1) Nexus 6P (H1511)
2) 6.0.1 Absolute stock, no rom, no root, no custom recovery. Build number MMB29P.
Recently got a new Nexus 6P and imported to Russia. All of the major bands here are supported. And the phone worked excellent for a few weeks, but then it lost all 3G or GSM connectivity. Just randomly,didn't do anything with it, the only thing I did is move to another city but than I got back, the issue didn't resolve. LTE works perfectly but can't call or receive calls, can receive sms though. Reseting network settings and factory reset changed nothing. Tried manualy set network to WCDMA or GSM with *#*#4636#*#* command, the moment I switch to anything besides LTE the connection is lost. Contacted the provider, no problem on their side, my SIM works good in other phones, my phone with other SIMs - no.
I don't think it is a hardware issue because a few times I managed to get everything working after an hour of switching networks and bands with no particular order in the *#*#4636#*#* testing mode.
After a while I figured that if I set phone to "GSM only" on USA bands in testing mode, but at the same time set it to "LTE prefered" in the normal network settings menu. I am able to set phone to Band mode 7 and set the network back to 2G in network settings keeping it on " GSM only" the whole time and only after this compicated algorithm and after a reboot 2G and 3G starts working. But any reboot after that revertes everything back to only LTE stage. Also if I get everything working but than reset network settings everything stops working again.
I have no idea what caused such an issue, I really hope someone can help.
Sorry couldn't post screenshots because of the "10 posts rule".

HELP!! 3G Mobile Data not working. Somebody please help..

By default the Network Mode is on LTE/WCDMA/GSM (Auto) mode but when I switch on mobile data, nothing shows up, no data connection. And sometimes even no voice service, it shows "emergency calls only".
But when I switch to GSM only mode, EDGE connection shows up (which is normal), Internet goes normal but very slow with EDGE connection (Sometime GPRS).
I tried to swap SIM with my friend, and their SIM works fine with my phone under LTE/WCDMA/GSM (Auto) mode and I do get HSPA and HSPA+ Signal. (Network provider setting changed to their network provider)
I contact my network provider and they said my SIM has no problem, they did insert my SIM into their device and found no problem with my SIM on their device, they get HSPA+ signal with my SIM. And they ask me to take my phone to check for hardware failure.
I checked the APNs and network provider setting, reset back to Stock ROM and clean install my ROM several times, still have no luck
My subscription do have HSPA connection and has been using it for months at the same location, but now it just stay at EDGE and GPRS only.
Is that really a hardware problem? Or could it be SIM problem?
Device Info:
Device: Samsung Galaxy Ace 3 LTE (S7275R)
ROM: CM13-20160315build
Recovery: TWRP 3.0.0.0
Xposed: Xposed v80 sdk23 arm
Network Provider: redONE
Hui0531 said:
By default the Network Mode is on LTE/WCDMA/GSM (Auto) mode but when I switch on mobile data, nothing shows up, no data connection. And sometimes even no voice service, it shows "emergency calls only".
But when I switch to GSM only mode, EDGE connection shows up (which is normal), Internet goes normal but very slow with EDGE connection (Sometime GPRS).
I tried to swap SIM with my friend, and their SIM works fine with my phone under LTE/WCDMA/GSM (Auto) mode and I do get HSPA and HSPA+ Signal. (Network provider setting changed to their network provider)
I contact my network provider and they said my SIM has no problem, they did insert my SIM into their device and found no problem with my SIM on their device, they get HSPA+ signal with my SIM. And they ask me to take my phone to check for hardware failure.
I checked the APNs and network provider setting, reset back to Stock ROM and clean install my ROM several times, still have no luck
My subscription do have HSPA connection and has been using it for months at the same location, but now it just stay at EDGE and GPRS only.
Is that really a hardware problem? Or could it be SIM problem?
Device Info:
Device: Samsung Galaxy Ace 3 LTE (S7275R)
ROM: CM13-20160315build
Recovery: TWRP 3.0.0.0
Xposed: Xposed v80 sdk23 arm
Network Provider: redONE
Click to expand...
Click to collapse
I have exactly the same problem! Same ROM as well. Update to various CM13 releases, factory reset to stock kernel and rom but nothing helps.

Can't connect to LTE

About a month or so ago, I went on vacation to Asia with my S7. I had it on airplane mode pretty much the whole trip but turned wifi on when available.
Since coming back, my S7 stopped being able to get on to the LTE network. It stays at 4G, which is HSPA speeds on my network. There is discussion about 4G and LTE being the same, but I'm experiencing much slower speeds...5-6Mbps compared to 25-30 when my phone showed LTE.
It's definitely my phone as I put my SIM in another S7 of the same network, and that phone went to LTE. Their SIM in my phone stayed at 4G.
I've tried various APN settings, made sure GSM/HSPA/LTE was selected, reset the network settings, tried some apps that said it would force LTE...but nothing is working.
When the app does force LTE it says I am in Roaming mode. I checked the CSC and it does show my correct network carrier code.
What can I do here?
Have you manually selected and registered with your carrier's network from the network settings?
Settings > Connections > Mobile Networks > Network Operators > Search Networks
Cleared cache from recovery?
Called your carrier?
Factory reset the phone

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