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[Q] No 4G/LTE/3G connection

I have the D6633 and the phone works great except that it won't connect to the 4G/3G/2G/LTE network. I can make calls, send sms normally. It even recognizes both sim cards connected. But internet only over wi-fi.
I called my operator, they say the phone is configured correctly, I tried my brother's sim card from another operator and the same happens.
So, the phone is clearly unlocked, if not it wouldn't recognize the sim cards at all. But no connection to the internet...
Any suggestions? I already did four factory resets, I recovered the Rom using sony software... Starting to get anxious here

fabiooli said:
I have the D6633 and the phone works great except that it won't connect to the 4G/3G/2G/LTE network. I can make calls, send sms normally. It even recognizes both sim cards connected. But internet only over wi-fi.
I called my operator, they say the phone is configured correctly, I tried my brother's sim card from another operator and the same happens.
So, the phone is clearly unlocked, if not it wouldn't recognize the sim cards at all. But no connection to the internet...
Any suggestions? I already did four factory resets, I recovered the Rom using sony software... Starting to get anxious here
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Click to collapse
Despite what your operator says, check your phone is configured correctly. Check the APN - copy it from someone else with the same phone on the same network. Which one are you on? Go into the network options and select 4g, or 3g, etc, one at a time. Select the network to connect to manually; you might have a 2g, 3g and 4g connection to chose from; try all of them.
If that fails, especially with what you said about your brother's sim card, it does sound like it's faulty.

fabiooli said:
I have the D6633 and the phone works great except that it won't connect to the 4G/3G/2G/LTE network. I can make calls, send sms normally. It even recognizes both sim cards connected. But internet only over wi-fi.
I called my operator, they say the phone is configured correctly, I tried my brother's sim card from another operator and the same happens.
So, the phone is clearly unlocked, if not it wouldn't recognize the sim cards at all. But no connection to the internet...
Any suggestions? I already did four factory resets, I recovered the Rom using sony software... Starting to get anxious here
Click to expand...
Click to collapse
Download Internet and MMS. Under settings, More, Internet Settings.
Double check that you have a tick box in Mobile data traffic under settings, More, Mobile Networks
If that doesn't work, then select Mobile networks, Network Operators, note this is quite slow, but should show a list of carriers or bands. Select the one for your sim, which will re-establish with the carrier (and should download the APN's) Access Point Names. If not talk to your operator what these should be and add them if they don't exist (they normally will have info about them on their internet sites.

danw_oz said:
Download Internet and MMS. Under settings, More, Internet Settings.
Double check that you have a tick box in Mobile data traffic under settings, More, Mobile Networks
If that doesn't work, then select Mobile networks, Network Operators, note this is quite slow, but should show a list of carriers or bands. Select the one for your sim, which will re-establish with the carrier (and should download the APN's) Access Point Names. If not talk to your operator what these should be and add them if they don't exist (they normally will have info about them on their internet sites.
Click to expand...
Click to collapse
That worked. I could not configure APN manually, it would not save no matter how many times I configured it. SO I used an APN APP from plaster and it worked. Thank you for the enlightenment!

good to hear it worked out

my new nexus 5 cannot detect 3g.

what i did :
1. i went to the settings>more>mobile networks>preferred network type > 3g - rebooted my device and this does not help. and then i call *#*#4636#*#* to check my network Type. it says "EDGE"
2. i upgraded my device to lolipop.. that did not help either..
3. downgraded to KitKat4.4.4.. still cannot detect 3g. Network type is EDGE.
4. i checked the APN. it was correct and was saved properly. still it says network type- EDGE. i went to the customer support of my network service provider. they are said they dont know why my device cannot detect 3g.
5. i have tried several factory reset too.. and still the network type is EDGE.
6. tried with different sim cards. still EDGE
7. i googled about this problem and found that it is a problem of EFS corruption. im not sure about this though..some websites saying to flash the modem of this device. i have no idea how to do that.
HELP

LG G3 850d 2G,3G,4G

Hi, I recently bought a LG g3 smarthphone and I found out that it's an AT&T version phone, but thankfully it's unlocked. My problem is, that it doesn't get any mobile network. In the setting it says that the Mobile network type this device can use is HSPA, my local carriers can only provide LTE, GSM and WCDMA rat types, I don't know if it's the case. I've tried to solve this on my own, but without luck. The solutions with 3845#*850# or similar codes just woun't work, when I choose any RAT it says: "succsess", but it doesn't change a thing and when I choose "LTE only mode", the phone blocks my mobile connection and says: "Restricted access changed: Data service is blocked" .
I really need any help, because I cannot see myself using a mobile phone without mobile internet. I tried to use 2G, 3G and 4G networks, but none work, nothing appears. Also I tried to fix this problem by flashing a Cloudy ROM wich is lollipop 5.0 and it didn't solve my internet problem. BTW, my location is Estonia.
I really need your help guys, I'm desperate as hell, this is my last option, because I didn't find any other solutions on my own.
Counting on you :3

romax11 said:
Hi, I recently bought a LG g3 smarthphone and I found out that it's an AT&T version phone, but thankfully it's unlocked. My problem is, that it doesn't get any mobile network. In the setting it says that the Mobile network type this device can use is HSPA, my local carriers can only provide LTE, GSM and WCDMA rat types, I don't know if it's the case. I've tried to solve this on my own, but without luck. The solutions with 3845#*850# or similar codes just woun't work, when I choose any RAT it says: "succsess", but it doesn't change a thing and when I choose "LTE only mode", the phone blocks my mobile connection and says: "Restricted access changed: Data service is blocked" .
I really need any help, because I cannot see myself using a mobile phone without mobile internet. I tried to use 2G, 3G and 4G networks, but none work, nothing appears. Also I tried to fix this problem by flashing a Cloudy ROM wich is lollipop 5.0 and it didn't solve my internet problem. BTW, my location is Estonia.
I really need your help guys, I'm desperate as hell, this is my last option, because I didn't find any other solutions on my own.
Counting on you :3
Click to expand...
Click to collapse
I think your a little confused about your network. HSPA IS WCDMA/GSM. You want to just slept gsm/WCDMA/LTE
Sent from my iPhone using Tapatalk

Flashing a ROM is not the solution. AT&T version of the LG G3 covers a limited radio frequency spectrum. It could be that the phone does not cover the frequency of your carrier. Another issue may be with the carrier themselves blocking the IMEI (I know some carriers require registering the IMEI on their network). Of course you must also make sure the carrier has data services available to you.

I kinda have the same problem....
No service.
I've tried everything to no avail.
Help gor a fix.

No signal at all / Can't register on GSM networks overseas

Good day! I have a strange problem with my VZW M8. Signal was suddenly gone. I tried bunch of gsm local sim cards(Philippines) but I don't have network signals at all. Tried manual search and found the networks to register it but no avail. And I tried to RUU and Factory reset via stock recovery. The problem still exists. What should I do. Please help Thanks!

GSM / Network Signal grey out

Hey all, thanks in advance for any advice offered.
For some reason my GS8+ has a greyed out GSM signal bar with an 'x' next to it. As far as I remember the only thing I did was put it to charge overnight. I've tried removing the SIM, still grey, inserting another carrier's SIM (known to be working), still grey, my original SIM also works fine in another phone. Everything else not related to cell service works fine (wifi, bluetooth etc.). I can see the IMEI number in settings as usual.
I've tried resetting the network settings, factory resetting the phone, I've even reloaded the ROM via Odin. No joy.
The phone is pretty much stock, except for the fact that I changed the carrier software from AT&T to Verizon in order to use a particular LTE band. Since I did that, the phone worked fine for several months.
I've only noticed two things odd thus far. After reloading the ROM and downloading a few updates, a game (Empire) appeared from nowhere installed in my app drawer. Also, the Airplane mode icon in the notification shade is light blue, similar to when it's transitioning from off to on. Airplane mode seems to work though, because I can toggle it, and the wifi reacts as such.
I can't search network operators manually (says: Error while searching for networks), changing the network mode does nothing, and none of the secret dialing codes work either. They all say "Mobile network not available". With a SIM inserted, my SIM status menu says, Network: unknown, Signal strength: -113dBm 0 asu, Service state: Radio off.
Sorry if I'm long-winded, but I'd appreciate any assistance at all. Thanks again for taking the time to read.

Hey, I'm having the same problem. Did you find a fix?

Nope.

I had a same issue after I update girlfriend's s7 . The ROM (custom one) was based on newer version but the firmware and BL were old.
I know and I understand that you just put it to charge overnight but you can give a try to flash latest firmware CRED one.
Allso is mandatory to chose the correct country and carrier. Chose the country where you are and Verzion carrier

I have same issue tried flashing other roms. All didn't work