S6 Ussd Code not working - Galaxy S6 Q&A, Help & Troubleshooting

Hello,
So i have a Galaxy S6 (Cricket US) Unlocked and i am using it here in Pakistan.
Problem is that everytime i try to enter Ussd code it gives me this error " Connection problem or invalid MMI code." and this pops up instantly i can't even see the "Ussd code running" that loads initially when you dail code.
I can still make calls and send texts even the imei check code (*#06#) is working.
This is not my carrier problem as the codes are working on other phones.
I have searched everywhere (google,yotube etc) and tried every solution but nothing helped me.
So far i have tried :
1-Restarting
2-Using , and + trick
3-Booting in Safe mode
4-Factory Reset
5-Selecting Mobile Network many times.
Here is some info by Samsung Phone info app
Model: SM-G920AZ
Knox Warranty: 0x0
Firmware CSC Code: AIO
CSC Country: USA / US
Mobile Operator: Zong / 41004
Android 7.0 / SDK 24

There might be a lock or some of its LTE(4G) bands, or the network type is set to LTE(4G) only (though this shouldn't have survived the factory reset), try setting the network type to auto or 3g/2g. Enable CS+PS (VC) in the menu with the band selection if it was changed there previously.

Related

[Q] Droid 2 Global

N00B here! but tried to gather as much info as I could..
Got a VZW droid 2 global from ebay that the seller profiled as "unlocked"
I'm in Central America and trying to register it with a GSM 850/1900 carrier but it won't connect to the network at all.
It had a 14 IMEI code... found it's translation to 15 to 17 IMEI and bought a the unlock code on a site. I got the unlock code but the phone has nowhere to enter it.
Found a post stating that it should ask for the code after inserting a foreign sim card or waiting 30 minutes if nothing happens. tried that and there's no prompt.
I have accessed the testing menu with *#*#4636#*#* and select the GSM only and WCDMA preferred (I got an HTC Inspire 4G working with that one here) and it is recognizing the GSM 850/1900 local carriers but unable to get any network access from them.
Found that VZW locks the carrier's network ids but the phone is recognizing them.
Again: ir recognizes the networks but is not asking for an unlock code... all the posts states to enter the code but they don't say how (the phone must prompt it automatically)
Please let me know if there is any way to manually pull up the field to enter the unlock code or if I can try anything else to unlock it
Thanks!
First, the phone's IMEI is written on the label under the battery.
Second, if you switch it to GSM mode it will output the IMEI in *#06# and in Settings, About phone, Status.
The 14 digit code you mentioned is probably MEID in hex form.
Switching to GSM is done by going to Settings, Wireless & networks, Mobile networks, Network Mode.
Using the service menu you mentioned is wrong and can lead to the phone being unable to connect to GSM at all, in which case you must reflash the SBF.
Actually I got the unlock code but there is nowhere to enter it.
Also it allowed to me to at least view the available networks after changing it to GSM/WCDMA and seems to be trying to connect to one but there's no signal at all.
If I do a network search now it will show me the available networks 5 or 6 (2G&3G), selected one and it just shows that it is not able to connect to that network
BTW, found that the radio was off as well and had to switch it on using the testing menu because by going to Settings, Wireless & networks, Mobile networks didn't allow me to access it at all, it was just grayed out and there was no way I could turn on the radio using that option..... sorry... I think I got everything I need except where to enter the unlock code
It looks like you have successfully (like other people before you) fried the GSM radio settings. Congratulations.
You need to flash the SBF to reset the phone's radio module to its original state.
If you actually bought a phone that was already unlocked it won't ask for an unlock code.
A locked phone asks for the code the moment you power it on and let it boot with a non-Verizon SIM card.
The code you supposedly bought is not for your phone at all, because you requested it for an IMEI you made yourself from something that was never an IMEI.
For me, The unlock screen appear only on original rom with non-verizon sim.
not appear on custom rom.

[Q] I9505 with DATA only subscription can't connect to network

Hi estimated XDA community,
I face a weird problem with my Samsung Galaxy S4.
History:
I bought it new, operator simlocked, in France
I use a second SIM from my operator, bound to the data quota of the "main" one, that allows me only for DATA connection
It used to work at the very begining in pure stock mode (was Android 4.2 by them)
I flashed several part of it, from CSC to Modem and OS to customize it
No major crash or problem during any of the flash made mainly with Odin
Application to change CSC (CSC select, changer, etc.) are usually non functionning
I could change my CSC to XEF through a flash of stock bootloader and CSC
Current state:
The phone is fully functionnal but do not connect to cellphone network (but does WIFI fine though)
I have signal "bars" displayed with fair reception and it is hooked to my operator network
I can't issue most of the USSD codes, it ends in a "unable to process request" *#0011#, *#1234#, etc. (but it seems I'm not the only one when running an Android 4.4.2 ?)
Testing with the SIM card of a friend, who has a standard voice+data subscription, the phone works and hooks the network in 3G
I changed my SIM yesterday to a new one, freshly activated, to test if it comes from that, problem stayed the same
Network Information tab :
Network : F SFR
Signal : -97 dbm
Mobile Network type : UMTS
Sservice state : in service
Roaming : not roaming
Mobile network state : disconnected
My phone number : unknown
Current configuration :
* PDA : Pure Android 4.4.2 JanJan
* Modem : XXUEMKE
Can it be related to my EFS partition being corrupted?
Is it a CSC problem ?

[Q] Why SIM country & operator codes wrong and how were additional APN's installed?

[Q] Why SIM country & operator codes wrong and how were additional APN's installed?
I’m in Ireland, The offices of the Garda Ombudsman (GSOC) was in the papers earlier this year because it was suspected they were being bugged. Also apparently the Gardai have been recording calls to and from police stations for years without the public (or lawyers) being informed. So recording of telephone calls/interception is topical here is topical now.
Wearing my tin-hat, I did a full wipe and installed a Cyanogen-based ROM on my rooted Samsung Galaxy S (i9000). I manually input the correct APN settings for my network operator (48Months/O2-IRL) and I installed Orbot
I never got a network configuration SMS/MMS from the network operator. But somehow, I found also installed (not immediately) were the following APNs:
Eastlink Internet: wisp.mobi.eastlink.ca
Proximus Internet: internet.proximus.be
Eastlink MMS: mms.mobi.eastlink.ca
Proximus MMS: event.proximus.be
It’s a new SIM from when I changed network operator a few months back. The above four APNs were also installed when it came and I queried this to 48 Months with no response. I never saw these APN’s with my previous network operator.
I downloaded a SIM reader app and got the following results:
SIM State - network locked
SIM country code - be
SIM Operator code 20601
SIM IMSI 20601 8816 582453
Phone type - gsm
Network country ID - ie
Net Oper code - 27202
Net Op name - O2 Irl
Net type - HSDPA
Voice roaming - on
Data roaming - off (even though in my phone settings it is showing as on)
So the SIM country code and SIM Operator code are wrong – being for an ISP in Belgium, and also there are those additional APNs which I never installed.
To my simple mind, APN settings are sent by network operators for auto configuration, so these APN’s came from the network operator. However, I have again queried with them and now they say “The tech team have replied this morning to confirm that there is nothing from the network or anything linked with your SIM that would cause your phone to change the settings on your phone.
Due to that they have had no option but to advise you that the phone must be the reason for this.”
But to my knowledge, there are no preinstalled APNs on the ROM (cm-MacKAY ROM Android 4.4.2), and also a 3rd party app can not edit the SIM country code /SIM operator code.
I would love to get an opinion from a developer more familiar with SIMs/APN’s please
Nearly SOLVED
OK, So tin hat is back in its box now...I emailed Eastlink in Canada and they seem to have solved it - very impressive especially when compared with the responses from my network!
"I have had our network team review your question and they have determined there is no security issue and no data traffic that would affect you.
Google has been changing the method that they use for APNs in AOSP. As part of that change APN's are preloaded in Kit Kat. Eastlink's APNs are correctly present in Kit Kat for Home Network Identity 20601.
If you require further assistance with your questions it is recommended the you contact Android Open Source Project or the Cyanogenmod on line.
Thank You for contacting Eastlink Wireless Customer care. "

No radio signal

Hi guys,
I bought an Galaxy S6 Edge Sprint, supposed to be unlocked. When I inserted my international GSM SIM card (tried with several carriers), it recognize it but when I'm searching for the network carrier it cannot find any, giving an error message.
By checking *#0011#: the following info return:
No Service
Network: UNBLOCK
IMEI Certi: PASS,1
Unknown
UE MODE:CSFB
ASM MIPI DEVICE FAIL
DEVICE MID=0x11a, PID=0x0d5
By checking IMEI online, is saying that is not blacklisted.
The phone was factory reset, and is on 6.0.1, Build MMB29K.G925PVPU4CPL3 if is of any use.
Can anyone tell me what can be wrong and if can be fixed?
Thanks a lot.
ASM MIPI DEVICE FAIL indicates that phone has HW problem. Please check phone HW.
check this
http://forum.gsmhosting.com/vbb/f77...-bt-more-no-service-due-femid-defect-2150065/

Samsung Galaxy S8+ (G955F) Partial Carrier Restriction

Hi,
I have a problem with my Samsung Galaxy S8+ (G955F) model. The phone shows Carrier ID: VOD (I guess means Vodafone/Product Code) in Odin Mode in Red Color, the phone is unlocked working on one carrier in all LTE/3G/2G networks but on other carrier it only works in LTE/3G modes and when i switch it to 2G only it doesn't register to a network on this second carrier and as long as i Turn it Back to LTE/3G/2G it registers but to only LTE or 3G.
I believe it is some kind of a partial carrier lock where the phone is locked on some carriers in different network modes.
Its not registering to 2G on Telenor Pakistan Network while it registers on LTE/3G/2G perfectly fine on Zong CMPak.
The phone doesnt require any kind of carrier unlock code or something.
Is there any way to work this around??? I have installed UK BTU Firmware from Sammobile, already debranded and works perfectly fine just not working in 2G mode on this one carrier.
Is there any way to change this product code or something while being on official Stock Firmware?
My Current Service Provider Version is: PAK/PAK/VOD
I want to change this to PAK/PAK/PAK and remove that Carrier ID: VOD thing from the odin mode display.
Please help!!!!!
hi did you find a solution??
Nopes. I just had to change my phone after all the things I tried, It won't go so I had no other option.

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