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[Q] No 3G/LTE signal. only G

i have problem with my data connection. when i set the preferred network to WCDMA only and LTE only. my phone has no signal at all. i have a strong 3G connection on my other phones.
is it a baseband problem?
if it is. how to flash the correct baseband for my F350L?
or this maybe a hardware problem?
thanks guys. appreciate who will help

bartdotnet said:
i have problem with my data connection. when i set the preferred network to WCDMA only and LTE only. my phone has no signal at all. i have a strong 3G connection on my other phones.
is it a baseband problem?
if it is. how to flash the correct baseband for my F350L?
or this maybe a hardware problem?
thanks guys. appreciate who will help
Click to expand...
Click to collapse
I see that you are from Manila and using a F350L please check supported bands by your network and the supported bands of F350L if they are compatible.

i did check it and it is same bands use here. there are f350L users here with no problems using their 3G connection.
My F350L is LTE-8 other F350L are LTE-A. I suspect that this two have different band

I am having the same Problem up here in Ohio
No matter what I try I can not seem to get this phone to do anything besides just G I am running the F350S on AT&T

Please look in Dialer with 5457#*350# and activate your Bands

Still no dice
letschky said:
Please look in Dialer with 5457#*350# and activate your Bands
Click to expand...
Click to collapse
I put the Checkmarks on the bands that AT&T Supports. But I am still only getting G

I have the same problem, you have a solution ?

Hi folks, I am Nigerian and I use an LG G Pro (D838). Some days back i noticed that i had no network on my phone so I tried inserting another sim into the device and still got the same result but other devices around had network coverage. I changed the network mode to GSM only and got 2G but WCDMA only gives me nothing. I have tried other sims on GSM only mode and got 2G but when i change the mode to WCDMA only, i get nothing at all. Have also put it to GSM/WCDMA auto but keeps giving me just 2G network only. I have even had to downgrade the OS from android 5.0.1 to 4.4.2 as suggested by a friend and still got the same issue. Please, what should i do??????

Same problem overhere Lg g pro 2 though F350k
I have the same problem in Holland. I have the F350k variant) 3G is in Holland 900/2100. The phone has despite of the advertisement text !!! by selling (900/2100) 850/1900/2100. The 2100 band is the same so should work.
Tried a lot. By the way last software and Androi 5.0.1.
The Sim is not the problem, the APN setting not, ........
any suggestions?
Could it be somewhere oleh software??????
DSpartan said:
Hi folks, I am Nigerian and I use an LG G Pro (D838). Some days back i noticed that i had no network on my phone so I tried inserting another sim into the device and still got the same result but other devices around had network coverage. I changed the network mode to GSM only and got 2G but WCDMA only gives me nothing. I have tried other sims on GSM only mode and got 2G but when i change the mode to WCDMA only, i get nothing at all. Have also put it to GSM/WCDMA auto but keeps giving me just 2G network only. I have even had to downgrade the OS from android 5.0.1 to 4.4.2 as suggested by a friend and still got the same issue. Please, what should i do??????
Click to expand...
Click to collapse

Hello everybody,
I try all you change and nothink,
I think we need to change your imei, add d838 imei
I try and i give you more information.

The imie is for d838 already...how aure are you dat after chaging the imie, it will work? And how do i go about changing the imie? Thanks

http://forum.xda-developers.com/lg-g3/general/request-3g-2g-lte-d850-t3300908...guys try this link

Did you get at least UMTS/WCDMA ?
have same problem too.
tried the qpst and the instruction but it didn't recognize my phone.

i have same problem with my f350l
need qcn file to fix it. but i can't find qcn file. (

bartdotnet said:
i have problem with my data connection. when i set the preferred network to WCDMA only and LTE only. my phone has no signal at all. i have a strong 3G connection on my other phones.
is it a baseband problem?
if it is. how to flash the correct baseband for my F350L?
or this maybe a hardware problem?
thanks guys. appreciate who will help
Click to expand...
Click to collapse
Which Rom you are using?

wandy77 said:
Hello everybody,
I try all you change and nothink,
I think we need to change your imei, add d838 imei
I try and i give you more information.[/QUOT
Hello, I am from Nigeria.
I bought my LG D838 on eBay in May 2015 and was quite impressed with the performance but my pride and happiness was short lived. I woke up one morning in December 2015, and noticed I didn't have any cell reception. I checked with my siblings and I seemed to be the only one who had no cell reception on the same network as theirs.
I swapped SIMS of other networks into my phone but still to no avail but funny thing was that whenever I change network mode to 2G only, I get reception but switching back to 3G only mode gave me nothing at all...this happened a few days after I updated the OS with a 50MB patch file using OTA as prompted. I have been writing to LG since then but no reply and it has frustrated me so much as I bought this phone for about USD 398 and didn't even get to use it up to a year. I managed it on 2G while trying to contact LG about it until the Wi-Fi and Bluetooth stopped responding also. I need the NV and QCN backup file for this phone in order to get it running again…I would really love to see this beauty run again. Please help me out.
You can contact me or send the file to [email protected]. I am open to suggestions.
Thanks in anticipation.
Click to expand...
Click to collapse

lte on ATT D850 G3 not connecting

I am using the ATT D850 G3 on a sim that supports the LTE band 3 1800mhz network. its running on the stock 5.0.1. It seems to not connect to the lte band. the issue is with the phone. can someone please help fix this.

adnshah said:
I am using the ATT D850 G3 on a sim that supports the LTE band 3 1800mhz network. its running on the stock 5.0.1. It seems to not connect to the lte band. the issue is with the phone. can someone please help fix this.
Click to expand...
Click to collapse
Just at because the sim does the phone might not support that band.
Sent from my iPhone using Tapatalk

hyelton said:
Just at because the sim does the phone might not support that band.
Sent from my iPhone using Tapatalk
Click to expand...
Click to collapse
Hi Hyelton, thank you for your reply. The phone does too, its listed on the specifications and it picks up the band and the network when I do a manual search for available networks. when trying to connect it connects to the HSPA+ network not LTE. I believe this is a limitation that ATT might have added. I need someone help me remove it.

adnshah said:
Hi Hyelton, thank you for your reply. The phone does too, its listed on the specifications and it picks up the band and the network when I do a manual search for available networks. when trying to connect it connects to the HSPA+ network not LTE. I believe this is a limitation that ATT might have added. I need someone help me remove it.
Click to expand...
Click to collapse
AT&T would NOT have a limitation on it. If you do a network search and it comes up, and fails to connect something somewhere else is wrong. Make sure you have the correct APN?

The APN settings have been checked and work fine on a note 3 N9005, somethings up with the d850, can someone help with that please

the phone does, the speck says, roaming 1800 on the att site and even the lg specs say it does. the but i think the stock rom on the att d850 some how prevents it, please help

Verizon M8 only connecting to 2G/GSM networks. No 3G/4G.

Hi All,
The issue with my Verizon M8 [the rare LRA (LTE for Rural America) subvariant] is that no matter what firmware version/RUU I use, I only get GSM connectivity on it. No WCDMA or LTE. I have checked the WCDMA bands in my country and that is not an issue. When I select WCDMA only option, I cannot get any signal. I have flashed the all the LRA (*.**.512.*) RUUs as well as all the Verizon (*.**.605.*) RUUs but no luck at all. If this issue might be related to PRL settings then please let me know if any of you have any idea. I have also checked the relevant WCDMA/LTE bands via CDMA tool and they are also enabled.
My M8 is currently S-off and has Super CID. I am using it outside the US on GSM network.
This has got me very frustrating and I need to find out if this is a software issue or a hardware issue. One more thing is that another guy here has exactly the same variant as mine. He bricked his radio by flashing the GSM firmware. I provided him my phone's relevant partition dumps and after flashing those onto his phone, his phone's radio became operational but now he has the same issue as mine. So I think that this issue might not be hardware related.
Any help on this will be greatly appreciated!!

Same problem

Anyone can provide any help on this??

any1 please help??

junaidawan86 said:
any1 please help??
Click to expand...
Click to collapse
do you know the actual bands/frequency the gsm network uses where you are? the prl is going to be pulled from your sim card. have you also tried a diff sim card?

izzaeroth said:
do you know the actual bands/frequency the gsm network uses where you are? the prl is going to be pulled from your sim card. have you also tried a diff sim card?
Click to expand...
Click to collapse
Hello. Yes, I know the bands used by 2G, 3G and 4G in my country. And yes I have switched sim cards even from different networks. The PRL version shows as 00000 when i look at it from the settings. I have even tried to update the PRL from a prl file provided by a xda user in some other thread but still it shows as 00000. I have seen some threads and ppl had this problem with One S. Though some of them were able to correct it by flashing some stock and custom radios.

junaidawan86 said:
Hello. Yes, I know the bands used by 2G, 3G and 4G in my country. And yes I have switched sim cards even from different networks. The PRL version shows as 00000 when i look at it from the settings. I have even tried to update the PRL from a prl file provided by a xda user in some other thread but still it shows as 00000. I have seen some threads and ppl had this problem with One S. Though some of them were able to correct it by flashing some stock and custom radios.
Click to expand...
Click to collapse
odd. i wonder if that lra model is sim locked like the sprint variant. is it also acknowledging you have a sim card inserted when you check in about phone? as in, does it display the sim #

izzaeroth said:
odd. i wonder if that lra model is sim locked like the sprint variant. is it also acknowledging you have a sim card inserted when you check in about phone? as in, does it display the sim #
Click to expand...
Click to collapse
Well, I thought too that it might be sim locked but then why it is working with 2G networks. There should be no signal at all then. Also these LRA variants are being sold by many online retailers including Amazon as sim unlocked phones. And yes it acknowledges when I insert or change a sim. Says "Preparing sim card" and then I get a signal (2G only). When I choose 3G only in network settings, the signal is gone immediately and I have to switch back to auto or 2G only to get the signal back.

@redpoint73
Any help on this???

junaidawan86 said:
Hello. Yes, I know the bands used by 2G, 3G and 4G in my country.
Click to expand...
Click to collapse
So then list the specific band numbers for 2G, 3G, and LTE for your carrier. That is really what the previous response was asking.

redpoint73 said:
So then list the specific band numbers for 2G, 3G, and LTE for your carrier. That is really what the previous response was asking.
Click to expand...
Click to collapse
900/1800MHz for 2G
2100MHz for 3G
850/1800MHz for 4G/LTE

junaidawan86 said:
900/1800MHz for 2G
2100MHz for 3G
850/1800MHz for 4G/LTE
Click to expand...
Click to collapse
This is strange, as the 3G band 2100 Mhz is really common (many countries use it for 3G, and most any recent US phone intended for foreign travel will support it), and should be supported by the device out-of-the-box. This tells me the problem is likely not RUU/firmware related.
You sure the APN is properly typed? And does your carrier use any different APN for 3G, LTE, etc.?

redpoint73 said:
This is strange, as the 3G band 2100 Mhz is really common (many countries use it for 3G, and most any recent US phone intended for foreign travel will support it), and should be supported by the device out-of-the-box. This tells me the problem is likely not RUU/firmware related.
You sure the APN is properly typed? And does your carrier use any different APN for 3G, LTE, etc.?
Click to expand...
Click to collapse
No it uses the same APN for all types and its configured correctly. I also thought the issue might rather be related to some NV values or PRL. If I set it to 3G only, it "Sees" the carrier as I can see a signal bar in network signal guru app, but the mobile is not able to connect to it.

so i am thinking that since this is a lra variant, a lot of bands may be disabled. have you seen anywhere else that someone got a lra variant to work outside the us? i know you said people were selling it as being unlocked, but maybe its not

izzaeroth said:
so i am thinking that since this is a lra variant, a lot of bands may be disabled. have you seen anywhere else that someone got a lra variant to work outside the us? i know you said people were selling it as being unlocked, but maybe its not
Click to expand...
Click to collapse
Well the LRA variant is practically the Verizon one with everything same as the Verizon variant. There a lot of links on both Amazon and eBay in which its mentioned that its LRA variant and is factory unlocked and can be used anywhere in the world. And yes I came across various threads on XDA in which people had this same variant, working fine (3G atleast) but they wanted to upgrade to Android 6 MM as there is no official update available for this variant after Android 5 Lollipop. As for the relevant bands (2100MHz for 3G used in my country), they were already unlocked (checked via CDMA Tool and QXDM).

junaidawan86 said:
Well the LRA variant is practically the Verizon one with everything same as the Verizon variant. There a lot of links on both Amazon and eBay in which its mentioned that its LRA variant and is factory unlocked and can be used anywhere in the world. And yes I came across various threads on XDA in which people had this same variant, working fine (3G atleast) but they wanted to upgrade to Android 6 MM as there is no official update available for this variant after Android 5 Lollipop. As for the relevant bands (2100MHz for 3G used in my country), they were already unlocked (checked via CDMA Tool and QXDM).
Click to expand...
Click to collapse
hmm this is quite the problem. if you can confirm you are using the same rom as the others, i would then think the issue is the radio being defective

izzaeroth said:
hmm this is quite the problem. if you can confirm you are using the same rom as the others, i would then think the issue is the radio being defective
Click to expand...
Click to collapse
I am using the stock LRA RUU (android 5.0.2). I have also tried the VZW RUUs from 4.4 to 6.0 but the same issue exists on them all. Even I have used GPE and Sense based custom roms but the same issue. I think that the issue might be related to some NV values or this phone might be network locked. Is there a way to check if the phone is network/sim locked? As I am getting the (2G) signals for all the networks in my country.

junaidawan86 said:
I am using the stock LRA RUU (android 5.0.2). I have also tried the VZW RUUs from 4.4 to 6.0 but the same issue exists on them all. Even I have used GPE and Sense based custom roms but the same issue. I think that the issue might be related to some NV values or this phone might be network locked. Is there a way to check if the phone is network/sim locked? As I am getting the (2G) signals for all the networks in my country.
Click to expand...
Click to collapse
it being sim/network locked makes sense, because the phone was made for people who live in the middle of nowhere. there would also be a high probability that none of those people will ever travel outside the country. i do not know anything about the nv values and tweaking them, but i have looked at that thread a few times. lastly, if you have only picked up 2g regardless of sim or apn used, it could be defective radios

junaidawan86 said:
Well, I thought too that it might be sim locked but then why it is working with 2G networks. There should be no signal at all then. Also these LRA variants are being sold by many online retailers including Amazon as sim unlocked phones. And yes it acknowledges when I insert or change a sim. Says "Preparing sim card" and then I get a signal (2G only). When I choose 3G only in network settings, the signal is gone immediately and I have to switch back to auto or 2G only to get the signal back.
Click to expand...
Click to collapse
did you get the solution for the problem since i need help as i am facing the same problem

quican said:
did you get the solution for the problem since i need help as i am facing the same problem
Click to expand...
Click to collapse
yes I got my issue fixed. Can u confirm which device you have? software version *.*.512* or *.*.605.*?

Note 5 N920P Network help

Hello Guys.
I am atin from india.
I purchased Imported note 5 N920P (sprint) which is gsm and cdma
Now i am unable to use 4g data services on the phone.
when i insert My gsm card in the phone , i see following NETWORK MODES
1. CDMA
2. LTE / CDMA
3. GSM / UMTS
4. AUTOMATIC
I have selected automatic.
my phone gets network and i can make n receive calls.
but can not use my 4g data service.
however 3g service works , and i can see 3g written on top.
where as in my indian note 5 , when i use 3g , its written H+ . and when using 4g , its written 4g on top
But in imported n920p , 4g does not work and 3g works .but does not show h+ sign.. instead , shows 3g sign
Its running on android 6.0 , when i tried to update it , it says "Device has been modified in unauthorized way. try update via smart switch on pc or take to service center"
please help me on using data services on this phone in India and also can anyone guide on why its not getting update?

atin_garg said:
Hello Guys.
I am atin from india.
I purchased Imported note 5 N920P (sprint) which is gsm and cdma
Now i am unable to use 4g data services on the phone.
when i insert My gsm card in the phone , i see following NETWORK MODES
1. CDMA
2. LTE / CDMA
3. GSM / UMTS
4. AUTOMATIC
I have selected automatic.
my phone gets network and i can make n receive calls.
but can not use my 4g data service.
however 3g service works , and i can see 3g written on top.
where as in my indian note 5 , when i use 3g , its written H+ . and when using 4g , its written 4g on top
But in imported n920p , 4g does not work and 3g works .but does not show h+ sign.. instead , shows 3g sign
Its running on android 6.0 , when i tried to update it , it says "Device has been modified in unauthorized way. try update via smart switch on pc or take to service center"
please help me on using data services on this phone in India and also can anyone guide on why its not getting update?
Click to expand...
Click to collapse
You need to find out what lte bands your carrier uses. And make sure they are comptible with the sprint varients lte bands.

TheMadScientist420 said:
You need to find out what lte bands your carrier uses. And make sure they are comptible with the sprint varients lte bands.
Click to expand...
Click to collapse
If what I've read is correct, Sprint Note 5s have the same hardware and radio band capability as the international version. So a hack or something should be possible. But how or what is way beyond me.

sinisin said:
If what I've read is correct, Sprint Note 5s have the same hardware and radio band capability as the international version. So a hack or something should be possible. But how or what is way beyond me.
Click to expand...
Click to collapse
Next would be to make sure your apn is correct

thanks for replying guys.
unauthorized firmware was loaded. so now it gets FRP lock .
Now i want to flash its stock firmware via odin, so i can use it again./
- does flashing it to stock n920P firmware will unlock the device? or it will remian sim unlocked?
- where can i find stock firmware?
TIA

Just got a S8+ and found out it doesn't support my carrier's network band

Just got a S8+ from my brother and was having some troubles with it (can text/use data but not recieve/make calls) and found out that the cause was because the phone supported the 4G LTE band of my carrier but not the 3G band which is what my carrier uses for calls.
So how screwed am I? is there anything I can do to fix this?
Samsung Galaxy S8+
Model: SM-G9550
Version: 8.0.0.0

nidh0gg said:
Just got a S8+ from my brother and was having some troubles with it (can text/use data but not recieve/make calls) and found out that the cause was because the phone supported the 4G LTE band of my carrier but not the 3G band which is what my carrier uses for calls.
So how screwed am I? is there anything I can do to fix this?
Samsung Galaxy S8+
Model: SM-G9550
Version: 8.0.0.0
Click to expand...
Click to collapse
Try in settings - connections - mobile networks and change network mode to 2g/3g or 3g mode and see if that works.
Note: I am still on nougat so settimgs location may be slightly different on oreo.

spawnlives said:
Try in settings - connections - mobile networks and change network mode to 2g/3g or 3g mode and see if that works.
Note: I am still on nougat so settimgs location may be slightly different on oreo.
Click to expand...
Click to collapse
i've tried it and it didn't work as the specific model phone I have does not support the 3G band of my carrier (Freedom Mobile) so I can't connect to any of my carriers bands aside from the 4g LTE one

nidh0gg said:
i've tried it and it didn't work as the specific model phone I have does not support the 3G band of my carrier (Freedom Mobile) so I can't connect to any of my carriers bands aside from the 4g LTE one
Click to expand...
Click to collapse
Is this your model
https://www.sammobile.com/devices/galaxy-s8-plus/specs/SM-G9550/
If so I would get in contact with your provider and see if is compatible with there network frequencies. apart from changing providers I am not sure what you can do.
If I've done my research properly freedom mobile is Canadian region apparently there are to modes home and away have you tried the away mode

spawnlives said:
Is this your model
If so I would get in contact with your provider and see if is compatible with there network frequencies. apart from changing providers I am not sure what you can do.
If I've done my research properly freedom mobile is Canadian region apparently there are to modes home and away have you tried the away mode
Click to expand...
Click to collapse
yes that is my phone
i think away might actually work really well, how would i force it to only use away/roaming?
okay this is weird, so i turned roaming on, connected to a different carriers network (rogers) and i can text and data fine but still cannot make or recieve calls on a AWAY network....? does this mean it shouldn't be a network band problem?
it shouldnt be my sim card as my sim card works fine on my older phone fine (s7E) and i JUST got it replaced my the warranty service (to fix this problem, which it didnt). It shouldn't be the phone either as my brother put his sim back in the phone and he can make calls fine....... what is wrong here?
IT WORKED THANK YOU SO MUCH!!!
changing to rogers did not work (not sure why? maybe they use the same band is freedom)
however afterwards i changed to telus and i got calls!!

spawnlives said:
Try in settings - connections - mobile networks and change network mode to 2g/3g or 3g mode and see if that works.
Note: I am still on nougat so settimgs location may be slightly different on oreo.
Click to expand...
Click to collapse
any reason why you haven't upgraded yet??

cantenna said:
any reason why you haven't upgraded yet??
Click to expand...
Click to collapse
If you mean upgrade to Oreo I do have some minor issues at the moment nothing really major for me to worry about if I do upgrade. To save going way off topic here might be better to start a new thread or I could pm you if you like.