Database Users

[Q] Baseband Switcher and Radio region how to

hi there i put an Etisalat sim in my defy (CM7) but no signal , so after searching n asking i knew i have to use Baseband Switcher and change something in my radio? would you please tell me what to do im newbie thanks alot

it all depends on your country and network.
In Australia we have 3 networks.
Telstra, Optus and vodaphone I think the other is.
Now there are heaps of mobile carriers but they will use one of these networks. Telstra is the easiest as they wont off sell there network to any other carrier. Optus and vodafone how ever they will sell them off to all the other carriers and what carrier uses what is up to them.
Your best bet is to ring your carrier ask what network they use and you should be able to find it in the baseband switcher.
If that fails google the carriers for your country and try them all in the switcher one is sure to work

Please use the Q&A Forum for questions &
Read the Forum Rules Ref Posting
Moving to Q&A

You may also need to Carrier unlock (CID) your phone in order to use the new SIM card on another provider.

Thanks guys , its solved the sim was broken .. stupid i know he bought new sim and all good

[Q] Only have T-Mobile Can't find ATT

----Seems like this is not the correct forum. will move it to unlock forum.
Need help on at&t network.
Recently i purchased one dual-core/dual-sim cellphone by one Chinese manufacture. It's claiming 4-band GSM, 850/900/1800/1900.
But when i insert att sim card, it always has 'Emergency calls only'. While with T-mobile sim card, it can be connect to T-mobile quickly.
As i know, TMB has 2G 1900 coverage, so as At&t. So i assume that this is not frequency issue. And i am pretty sure that this cellphone does have any 'lock' problem since all phone in China doesn't lock.
It took me a few days searching the solution but no luck. Network operators is grayed out when with att sim card.
This is what i'v tested:
-ATT, H2O prepaid card, no help.
-Changed the APN, no help
Then i go further, modified 'BP' firmware, like changing QCN (it's Qualcomm chipset) item 1877 according to this post, http://forum.xda-developers.com/showthread.php?t=1521355&page=7.
But still no att.
So i am just looking for help from xda. for now, i can't tell what's the issue is.
I can provide more info if someone has some thought.

herry_1234 said:
----Seems like this is not the correct forum. will move it to unlock forum.
Need help on at&t network.
Recently i purchased one dual-core/dual-sim cellphone by one Chinese manufacture. It's claiming 4-band GSM, 850/900/1800/1900.
But when i insert att sim card, it always has 'Emergency calls only'. While with T-mobile sim card, it can be connect to T-mobile quickly.
As i know, TMB has 2G 1900 coverage, so as At&t. So i assume that this is not frequency issue. And i am pretty sure that this cellphone does have any 'lock' problem since all phone in China doesn't lock.
It took me a few days searching the solution but no luck. Network operators is grayed out when with att sim card.
This is what i'v tested:
-ATT, H2O prepaid card, no help.
-Changed the APN, no help
Then i go further, modified 'BP' firmware, like changing QCN (it's Qualcomm chipset) item 1877 according to this post, http://forum.xda-developers.com/showthread.php?t=1521355&page=7.
But still no att.
So i am just looking for help from xda. for now, i can't tell what's the issue is.
I can provide more info if someone has some thought.
Click to expand...
Click to collapse
Weird. What is your zip code? You might need to search FCC frequency licenses to see what carrier frequencies are for your area.

[Q] Unlocked GS4 originally verizon no mobile data??!?

so i am trying to sell my verizon GS4 to someone who is on T-mobile so i unlocked the carrier using the secret menu and following the steps to unlock the carrier provided by wonder how to and everything went fine but now if i try to make a call or send a text it says that there is no data connection!! will this happen if someone puts their T-mobile sim in too? am i completely screwed? Any advice is extremely appreciated!!!!

tylermck71 said:
so i am trying to sell my verizon GS4 to someone who is on T-mobile so i unlocked the carrier using the secret menu and following the steps to unlock the carrier provided by wonder how to and everything went fine but now if i try to make a call or send a text it says that there is no data connection!! will this happen if someone puts their T-mobile sim in too? am i completely screwed? Any advice is extremely appreciated!!!!
Click to expand...
Click to collapse
Unfortunately you're in the wrong forum. This is the forum for the AT&T S4 Active. If you're looking for the regular S4 Verizon try posting here.

[Q] new to verizon galaxy S5

Just bought verizon galaxy S 5. Changed SIM to AT&T from straight talk. First of all was that a mistake? When ever i leave a wi-fi area the phone goes to emergency calls only. Email and text stops as well. Can't get voice mail to work anywhere
Would appreciate any help.
Thank you

Just a thought, go to settings /more networks and make sure you have the correct network checked

New to verizon galaxy s 5
The network was correct . Wondering if im in a bad area. My Iphone 4 works fine. Might be AT&T

jokey321 said:
Just bought verizon galaxy S 5. Changed SIM to AT&T from straight talk. First of all was that a mistake? When ever i leave a wi-fi area the phone goes to emergency calls only. Email and text stops as well. Can't get voice mail to work anywhere
Would appreciate any help.
Thank you
Click to expand...
Click to collapse
jokey321 said:
The network was correct . Wondering if im in a bad area. My Iphone 4 works fine. Might be AT&T
Click to expand...
Click to collapse
Wait... you put an AT&T sim in your phone? This is a Verizon forum. If I misunderstood, please tell me.

Just to be clear because you didn't state it in your post, you must unlock your phone prior to using a non-Verizon SIM. You can sometimes get these unlock codes from Verizon but you can also buy them online. I've used GSMLiberty.net with success before. After that, you should be able to pop in your SIM from the new carrier and begin using it right away. In some cases, you may need to manually add the correct APN for your carrier. Find these settings under Settings > More networks > Mobile networks > Access point names. Click the little plus icon in the top right and manually enter AT&T's APN information. You may need to Google that as I don't know AT&T's APN info.
I use my Verizon S5 on T-Mobile's networks with absolutely no issues, I assume it would be a similar experience for AT&T as well. For me, I put my T-Mobile SIM card in and could make calls and receive texts, but mobile data and MMS was not working properly until I manually added the correct APN information. After that, MMS, 4G LTE data and everything is working flawlessly.

You do not need an unlock code for a LTE Verizon phone. These phones are already unlocked. One must set the correct APN.
Do not buy an unlock code!
I have used my Verizon S5 with att and t-mobile.
Good luck.
Sent from my C6806_GPe using Tapatalk

thank you all
Thank you for your posts. Most of the phone works. When I leave a wi-fi area my phone goes to emergency calls only. When I go back to a wi-fi area the normal call service works again. I'm new to verizon and samsung. Wanted to use straight talk because i didn't feel like paying a fortune for service. I'll get it figured out some way.
Thank you again

My nexus 6p can't call and receive call

Hi everyone please I need help
I buy nexus 6p form USA , and I am bring it at Saudi Arabia
After 2 weeks with a good mobile am surprised my phone can't call and receive calls
I tried to change preferred network to 2G or 3G but
I can't and I tried by *#*#4636#*#* still can't, only used lte and mobile data ,
I tried 3 sim card with different companies at my country
and the problem it's still
Please help me pleeeaaase

Hello please answer me

Tried calling the carriers for assistance?
Sent from a 128th Legion Stormtrooper 6P

Ferasmn said:
Hi everyone please I need help
I buy nexus 6p form USA , and I am bring it at Saudi Arabia
After 2 weeks with a good mobile am surprised my phone can't call and receive calls
I tried to change preferred network to 2G or 3G but
I can't and I tried by *#*#4636#*#* still can't, only used lte and mobile data ,
I tried 3 sim card with different companies at my country
and the problem it's still
Please help me pleeeaaase
Click to expand...
Click to collapse
Is your phone reading your sim card.. Did the network come up on the screen?

Yes it's reading a sim card , and I call carrier assistance

Please help me

Ferasmn said:
Please help me
Click to expand...
Click to collapse
Are you rooted?
Did you reboot your phone?
Did you do a factory reset?
Sent from my Nexus 6P using Tapatalk

Are you rooted? No
Did you reboot your phone? Yes
Did you do a factory reset? Yes

You said data works but calls don't?
Sent from a 128th Legion Stormtrooper 6P

Ferasmn said:
Are you rooted? No
Did you reboot your phone? Yes
Did you do a factory reset? Yes
Click to expand...
Click to collapse
did you reflash the Stock Rom?
You should give it a try if you didnt.(does not void warranty)
Contact google, they will probably send you a replacement if you dont want to mess with it that much.

Yes,data works but calls don't

I'm going to suggest a longshot here. It seems that you've gotten some good suggestions so far, so I want to throw this idea out there.
Have you "provisioned" your phone lately & updated the PRL? Meaning, have you told the phone to connect to your cellular carrier, then the carrier then tells your phone what services you are paying for & are supposed to have & what cellular towers you can use? Doing just this usually fixes all sorts of problems.
Go to Settings (the little gear icon), then More (in the Wireless & Networks). Cellular Networks, Carrier Settings. Tap on Update device config. Let it talk to the network. Tap on OK. After that, Update the PRL. Let it do it's thing. Tap on OK.
No reboot is necessary. It should be making calls, receiving calls & data should all be working.
Also, I keep the Preferred network type to global, although my carrier is CDMA & I'm in the US.

Hi dear , can't find carrier setting , I am search in the all my phone can't find it

Ctrl_Alt_Del said:
I'm going to suggest a longshot here. It seems that you've gotten some good suggestions so far, so I want to throw this idea out there.
Have you "provisioned" your phone lately & updated the PRL? Meaning, have you told the phone to connect to your cellular carrier, then the carrier then tells your phone what services you are paying for & are supposed to have & what cellular towers you can use? Doing just this usually fixes all sorts of problems.
Go to Settings (the little gear icon), then More (in the Wireless & Networks). Cellular Networks, Carrier Settings. Tap on Update device config. Let it talk to the network. Tap on OK. After that, Update the PRL. Let it do it's thing. Tap on OK.
No reboot is necessary. It should be making calls, receiving calls & data should all be working.
Also, I keep the Preferred network type to global, although my carrier is CDMA & I'm in the US.
Click to expand...
Click to collapse
Hi dear , can't find carrier setting , I am search in the all my phone can't find it

Please help me brothers..!

Ferasmn said:
Please help me brothers..!
Click to expand...
Click to collapse
Last time something like that happened to me was, when my old iPhone 6 had a blacklisted IMEI number. I could use all my data with the phone but not text or call anyone. Can you text people through SMS?

Yes I can text

Dears any solution s

Ferasmn said:
Dears any solution s
Click to expand...
Click to collapse
Really don't know either then. You said that you tried to change your preferred Network from LTE to 2g/3g but you can't? Are you always connected to LTE then? As far as i know you can't call on LTE.

my phone is also can not call and receive calls,text and 4G are still useful.It just stay in 4g and can not change to 2/3g.Hope someone can help us.