Related
Hi, I've got a Z3 dual D6633 which I want to use with an EE SIM in the UK. I've tried a cut down microsim and been into the EE shop and tried one of their nano SIMs but both don't work correctly in the phone.
The cut down SIM makes a service phone.android.com or something like that continually crash and doesn't connect to the network.
The one I tried in the shop just doesn't connect to the network.
This is on 23.0.F.1.74 and .82 I noticed in the release notes for .82a fix for Yoga SIMs in Russia but don't know what the problem there was, but wonder if it is linked. All other UK Sims work including 3, Lyca, giffgaff, Vodafone, virgin just not EE. has anyone got an EE one working or had similar problems?
I did notice that an app/widget I use called phono to show network info and signal strength usually shows the IMEI when no SIM inserted or the MSISDN, however with the non-working EE SIM it just shows 00000 - not sure which field it is getting wrong. Oh and yes the SIMs work fine in all other phones I've tried.
I do need to try more tests on factory reset and removing phono etc but so far it looks to be a firmware incompatibility with EE Sims.
OK, so I did a few more tests and got hold of another nano SIM on EE.
So it looks like the 23.0.F.1.74 firmware does not like EE SIMs and the phone application constantly crashes. On the later .82 firmware it works fine. I was mislead a bit by going into an EE store and trying a SIM - they must have given me an un-provisioned SIM to try. I stupidly assumed they would have actually given me a SIM that worked, doh!
I'm experiencing something similar here. I have the D6633, bought in UK, now I am in Brazil and the phone works great except that it won't connect to the 4G/3G/2G/LTE network. I can make calls, send sms normal. 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...
Same issue
adrenalize_ said:
OK, so I did a few more tests and got hold of another nano SIM on EE.
So it looks like the 23.0.F.1.74 firmware does not like EE SIMs and the phone application constantly crashes. On the later .82 firmware it works fine. I was mislead a bit by going into an EE store and trying a SIM - they must have given me an un-provisioned SIM to try. I stupidly assumed they would have actually given me a SIM that worked, doh!
Click to expand...
Click to collapse
Hello, I have the exact same problem. How did you get the firmware .82/for what country? Is everything working well with it? Really appreciate your guidance.
I had the same problem with the EE sim card, ended up sending the phone back.
fabiooli said:
I'm experiencing something similar here. I have the D6633, bought in UK, now I am in Brazil and the phone works great except that it won't connect to the 4G/3G/2G/LTE network. I can make calls, send sms normal. 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...
Click to expand...
Click to collapse
Just a thought, but is it definitely a 6633 and not some other variant which perhaps doesn't work in your country/network?
pconcha said:
Hello, I have the exact same problem. How did you get the firmware .82/for what country? Is everything working well with it? Really appreciate your guidance.
Click to expand...
Click to collapse
I purchased my D6633 from Saudi Arabia and the 23.0.F.1.82 update came as an OTA notification about a week ago.
If you look in this thread http://forum.xda-developers.com/z3/general/d6633-z3-dual-updated-to-23-0-f-1-82-t2929352/ it mentions that someone thinks the update has only been released for Saudi and Brazil - I assume it is for Europe as well as one of the release notes says a problem with Russian Yota SIMs has been fixed. I think there are also links to the firmware in there although I've not looked that hard as I got the OTA. I guess it might still in my memory - anyone know where Sony stick their OTAs?
Seems to work fine so far - no noticeable difference - well other than EE SIMs now work!
jadaress1 said:
I had the same problem with the EE sim card, ended up sending the phone back.
Click to expand...
Click to collapse
Ah, shame as it looks like the update might have fixed it. I was thinking I might have to go to another handset too (The Samsung G900FD is OK if you can put up with touchwiz and other Samsung "features"!!)
fabiooli said:
I'm experiencing something similar here. I have the D6633, bought in UK, now I am in Brazil and the phone works great except that it won't connect to the 4G/3G/2G/LTE network. I can make calls, send sms normal. 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...
Click to expand...
Click to collapse
Hmmm, sounds like another issue as with mine the EE SIM caused the phone.apk to constantly crash/restart.
Did the data work OK in the UK?
As you can make calls/SMS I assume you are at least on a 2G network which should still give you (very slooow) data - It does sound more like an APN issue - or something else. I know you said you checked with your operator what their APN settings should be (just my experience with operator customer support lines) - but I would try and have a look yourself - and maybe list your APN settings and operator and someone may spot something.
I have seen a couple of phones / operators where the "APN type" in the APN settings needs specific settings - its down the bottom and often isn't mentioned when people get the settings. For example in my current settings I have "default,hipri,dun,supl" for Virgin mobile in the UK.
You may want to search XDA/Google or start your own thread which might get more reads/replies
adrenalize_ said:
You may want to search XDA/Google or start your own thread which might get more reads/replies
Click to expand...
Click to collapse
...or try some of the things which have already been suggested and post your findings !
adrenalize_ said:
Hmmm, sounds like another issue as with mine the EE SIM caused the phone.apk to constantly crash/restart.
Did the data work OK in the UK?
As you can make calls/SMS I assume you are at least on a 2G network which should still give you (very slooow) data - It does sound more like an APN issue - or something else. I know you said you checked with your operator what their APN settings should be (just my experience with operator customer support lines) - but I would try and have a look yourself - and maybe list your APN settings and operator and someone may spot something.
I have seen a couple of phones / operators where the "APN type" in the APN settings needs specific settings - its down the bottom and often isn't mentioned when people get the settings. For example in my current settings I have "default,hipri,dun,supl" for Virgin mobile in the UK.
You may want to search XDA/Google or start your own thread which might get more reads/replies
Click to expand...
Click to collapse
It was working fine there. Here It apparently could not download APN settings, so I installed an APN APP and now it works fine!!!
---------- Post added at 12:36 PM ---------- Previous post was at 12:30 PM ----------
poldie said:
Just a thought, but is it definitely a 6633 and not some other variant which perhaps doesn't work in your country/network?
Click to expand...
Click to collapse
Working great now!!!! I used an APN APP form PlayStore
adrenalize_ said:
I purchased my D6633 from Saudi Arabia and the 23.0.F.1.82 update came as an OTA notification about a week ago.
If you look in this thread http://forum.xda-developers.com/z3/general/d6633-z3-dual-updated-to-23-0-f-1-82-t2929352/ it mentions that someone thinks the update has only been released for Saudi and Brazil - I assume it is for Europe as well as one of the release notes says a problem with Russian Yota SIMs has been fixed. I think there are also links to the firmware in there although I've not looked that hard as I got the OTA. I guess it might still in my memory - anyone know where Sony stick their OTAs?
Seems to work fine so far - no noticeable difference - well other than EE SIMs now work!
Click to expand...
Click to collapse
I see. Mine is the d6633 but it is customized for HK. I have not received the OTA upgrade yet. I have checked xperifirm as they may have it but will wait for the OTA upgrade. Sony must be releasing soon.
Thank you for replying! I am using Vodafone in the meantime, but want to go back to my EE plan!
about dual sim connectivity
can anyone tell me which sim card slot support 2G, 3G and 4G or LTE
I heard that 1 slot support only 3G and 4G
and other one is support 2G & 3G so kindly confirm me what is actual.
thanks
arfan.chatha said:
can anyone tell me which sim card slot support 2G, 3G and 4G or LTE
I heard that 1 slot support only 3G and 4G
and other one is support 2G & 3G so kindly confirm me what is actual.
thanks
Click to expand...
Click to collapse
For mine, on my networks here in Australia, I can assign 4G LTE to any sim, however, that makes the other sim 2G only (GSM).
The other option is to have both at 3G (WCDMA/HSPA).
If you assign 4g to sim one that work only for 4g or like other phones "LTE(preference)/WCDMA/GSM"
4g not available automatically search 3G if 3G not available automatically search 2G?
Assume second sim is on 2g
arfan.chatha said:
If you assign 4g to sim one that work only for 4g or like other phones "LTE(preference)/WCDMA/GSM"
4g not available automatically search 3G if 3G not available automatically search 2G?
Assume second sim is on 2g
Click to expand...
Click to collapse
Yes, your 4G sim slot will fall back onto 3G and 2G as per expected for most handsets.
help needed
sephstyler said:
For mine, on my networks here in Australia, I can assign 4G LTE to any sim, however, that makes the other sim 2G only (GSM).
The other option is to have both at 3G (WCDMA/HSPA).
Click to expand...
Click to collapse
I just got a 6633 through kogan and i am having real trouble getting it to connect to optus network with iinet and truphone simcards. Does anyone know if i need to update any settings or firmware from factory to make it compatible. I can see iinet and truphone lte networks (which i assume is the optus 4g network) when searching manually but the phone wont connect. Sims work in a mates iphone6 without a problem.
Don't suppose anyone knows how to get rid of the #sim card icon on the statusbar?
adrenalize_ said:
I purchased my D6633 from Saudi Arabia and the 23.0.F.1.82 update came as an OTA notification about a week ago.
If you look in this thread http://forum.xda-developers.com/z3/general/d6633-z3-dual-updated-to-23-0-f-1-82-t2929352/ it mentions that someone thinks the update has only been released for Saudi and Brazil - I assume it is for Europe as well as one of the release notes says a problem with Russian Yota SIMs has been fixed. I think there are also links to the firmware in there although I've not looked that hard as I got the OTA. I guess it might still in my memory - anyone know where Sony stick their OTAs?
Seems to work fine so far - no noticeable difference - well other than EE SIMs now work!
Click to expand...
Click to collapse
Have you managed to root it? I rooted the 23.0.1.f.0.96 firmware for my Z3 D6633, but after a while (half a day) it starts to reboot frequently, and Google Play stops working (can browse apps, but not download them, as the download bar never progresses).
Also, my EE sim seems to work, but the phone still shows it as 'Sim 1 0000000' whereas other sims simply appear as sim 1 and sim 2.
I am wondering if I should just downgrade back to 23.0.F.1.74 and move from EE to Vodafone or 3...
Ah, work forced a BlackBerry (yuck!) on me and I've since sold the D6633.
Hi All
I hope this is the right forum, but am now at my wits end...
I have a UK Galaxy S4 (GT-i9505)... it was factory unlocked and I tested this by trying an EE SIM and a Tesco's SIM (O2) before buying and all seemed good and I made outbound calls on both networks.
Anyway I upgraded via Kies to the current Lollipop ROM (5.0.1) and immediately couldn't always make calls on EE - so as it worked sometimes and not others I suspected that the SIM tray was failing (especially as I was getting 'No SIM card' error ocassionally). So I ordered a new SIM tray and replaced the old one last night - but still have the same error.
Last night it was working on Tesco (O2) and not on EE... then after a reboot it was suddenly all working and so I assumed it was a glitch, but I have played about with it a bit more today and sometimes both SIMs work and sometimes only the Tesco (O2) one works. When I put the EE SIM in it doesnt ask me for a network pin - it usually says "not activated on network". The only consistent thing is the O2 SIM seems to work all the time. When the EE SIM is inserted, the "No SIM Card" message does disappear - so I am sure it is seeing the EE SIM OK. Also - the EE SIM is my main carrier and is working with no problems in my EE locked Galaxy S4 running KitKat - so I am happy that the SIM is OK!
I have checked the IMEI number on Swappa and it shows as not blacklisted and indeed describes the handset as an unlocked S4.
Can anyone help? I cant be 100% sure but I think that when I had KitKat ROM loaded it did on one or two ocassions give a SIM error but this just supported my thought that the SIM tray was faulty. It is only now that I am at a loss
Just for info, here is the other info about the handset;
BB - I9505XXUHOD5
Kernel - 3.4.0-3996895 / [email protected]#1 / Wed Apr 15 20:54:31 2015
Build - LRX22C.I9505XXUKOD5
Any help would be very welcomed!!
Thanks in advance
No thoughts anyone?
OK, will try to downgrade to KitKat and will let you know what happens when I have done it
Thanks
SlipMat said:
No thoughts anyone?
OK, will try to downgrade to KitKat and will let you know what happens when I have done it
Thanks
Click to expand...
Click to collapse
Hi,
This may help you:
http://forum.xda-developers.com/galaxy-s4/general/i9505-downgrade-5-0-lollipop-to-4-4-2-t3052472
Hi ,
I recently bought Vodafone Smart Ultra 6, which is obviously locked to Vodafone. I did all the start-up settings and everything was running fine. Since my actual network carrier was EE ( Orange ) I unlocked the phone, which worked alright up until the point where it suddenly the phone would lose reception and regain it at random times. I thought that since my sim was really old and cut with a template to fit the nano sim requirement, I messed something up. I didn't mind swapping carriers since I wasn't that happy with my tarrif, so I ordered GiffGaff sim, got my PAC number from EE and activated my new GiffGaff sim with my old number.
I know for a fact that the sim works, because I tried it on different device, but my phone acts like it's locked to EE after the unlocking I did from vodafone. Every sim card I insert is unrecognisable by the phone, except the old EE card which is no longer active.
I tried doing factory restore, which didn't do anything.
Dialing *#*#4636#*#* and turning the radio on and off -> still nothing
I have no other idea what to do and I can't find any solution on the internet.
My android is 5.1.1 which I read that has similar problems on different devices, but none of the solutions I found worked for me.
Any help will be much appreciated.
I am sorry if the post is confusing and doesn't make much sense :/
To summarise:
The phone was locked to Vodafone and Unlocked immediately with an EE card inside
Now the phone constantly shows NO SIM CARD - Emergency Calls Only ( tried on GiffGaff and Vodafone Sim )
No Network Connection - Can't connect ( tried on EE Orange after initially unlocking, the sim is no longer active)
Thanks in advance!
XDA Visitor said:
Hi ,
I recently bought Vodafone Smart Ultra 6, which is obviously locked to Vodafone. I did all the start-up settings and everything was running fine. Since my actual network carrier was EE ( Orange ) I unlocked the phone, which worked alright up until the point where it suddenly the phone would lose reception and regain it at random times. I thought that since my sim was really old and cut with a template to fit the nano sim requirement, I messed something up. I didn't mind swapping carriers since I wasn't that happy with my tarrif, so I ordered GiffGaff sim, got my PAC number from EE and activated my new GiffGaff sim with my old number.
I know for a fact that the sim works, because I tried it on different device, but my phone acts like it's locked to EE after the unlocking I did from vodafone. Every sim card I insert is unrecognisable by the phone, except the old EE card which is no longer active.
I tried doing factory restore, which didn't do anything.
Dialing *#*#4636#*#* and turning the radio on and off -> still nothing
I have no other idea what to do and I can't find any solution on the internet.
My android is 5.1.1 which I read that has similar problems on different devices, but none of the solutions I found worked for me.
Any help will be much appreciated.
I am sorry if the post is confusing and doesn't make much sense :/
To summarise:
The phone was locked to Vodafone and Unlocked immediately with an EE card inside
Now the phone constantly shows NO SIM CARD - Emergency Calls Only ( tried on GiffGaff and Vodafone Sim )
No Network Connection - Can't connect ( tried on EE Orange after initially unlocking, the sim is no longer active)
Thanks in advance!
Click to expand...
Click to collapse
Greetings,
Thanks for using XDA Assist.
Please create an account so you can post in the other forums here.
After that, please post your question here:
http://forum.xda-developers.com/showthread.php?t=2259645
You'll find expert advice there.
Good luck and welcome to XDA!
I brought G930FD galaxy s7 in Singapore during my deployment. It worked fine with other countries sim card. Now i'm back in US tried to use my phone with Verizon sim card
and it didn't work. I got signal but there is no network connection, only Emergency call pop up for a minute then gone.
I tried to adjust the APN but didn't work. Also my phone kept saying "Refreshing Sim Card" couple times. I did some reseach if it's actually region lock but I couldn't find a straight
answer for it. I wonder if this phone is really region lock. If not then what could be a problem for it?
Stal2Gazel2 said:
I brought G930FD galaxy s7 in Singapore during my deployment. It worked fine with other countries sim card. Now i'm back in US tried to use my phone with Verizon sim card
and it didn't work. I got signal but there is no network connection, only Emergency call pop up for a minute then gone.
I tried to adjust the APN but didn't work. Also my phone kept saying "Refreshing Sim Card" couple times. I did some reseach if it's actually region lock but I couldn't find a straight
answer for it. I wonder if this phone is really region lock. If not then what could be a problem for it?
Click to expand...
Click to collapse
From what I know, in order to unlock the region lock, you have to make at least 5 minutes of phone calls in the place you got it. At least this is how it is with the European version I have.
Now about the network issues, if it wasn't a carrier version then it should be unlocked, meaning you can put any Sim card.
My bet, since it's from another country, is that you have to call Verizon and ask them to let it in their network.
I don't believe the G930FD supports CDMA...it is a GSM phone. This is means no compatibility with Verizon or Sprint. You need the US version of the S7 (with the Snapdragon chip) to get CDMA support.
https://www.frequencycheck.com/carr...e-samsung-hero/verizon-wireless-united-states
I have a SM-G955N Korean model I bought from eBay. Everything works except Mobile Data. I call ATT (my service) got connected with their Advance Division, and they not did help.
We tried setup a new connect under Access Point Names with no luck. I did notice that more ATT type APNs did add to the list of APNs, I tried each and powered off the phone each time, no luck.
My Wi-Fi works just not the Mobile Data. I typed in the Service Mode code which I got from another thread *#2683662#,(thanks XDA Developers), what I got looks like this:
MAIN MENU
[1] Protocol
[2] UE Setting & Information
[3] ETC
MOBILE: null
MOBILE_IMS: null
When I access The 1,2,3 pages I always get the MOBILE: null and MOBILE_IMS: null at the bottom of every page. My guess these are error codes.
Any help or ideas would be great.
Thank you.
Same here with 955n, null also but I have mobile data running. Lte it says instead of 4g i had on my 955f.
Sent from my SM-G955N using Tapatalk
---------- Post added at 06:34 PM ---------- Previous post was at 06:32 PM ----------
Lte instead of 4ghttp://cloud.tapatalk.com/s/5925d2414e052/Screenshot_20170524-213318.png?
Sent from my SM-G955N using Tapatalk
So yours works, Mobile Data, but you are seeing the MOBILE: null and MOBILE_IMS: null Both or just one?
I read that the seller of a Korean phone has to start it up with a Korean sim card and make a call for 5 minutes or the phone will not work out of their country.
I wonder if this is what happens? No Mobile Data connection.
same for EU phones - if you bought from EU you'd have to 'unlock' it first with an EU sim else it won't work
This guy can help:
Look at this on eBay http://www.ebay.com/itm/322518132661
He switched my S8+ from Tracfone to T-Mobile with all bands working w/ 4G LTE to the point one can't even tell this phone belonged to a different carrier than T-Mobile.
P.S. I had the same issue to where I could connect & surf the Internet with 4G but I was unable to make calls/texts. After he did his magic, which was remotely by the way, my phone got a new life. I bought his service four days ago and my phone is working phenomenally well so far. Give it a try guys.
Does anyone know of a way to unlock the T-Mobile bands on this phone? - the SM-G955N, Can it be done?
There are no clickable options when I access the service menu.
skyprotocol99 said:
Does anyone know of a way to unlock the T-Mobile bands on this phone? - the SM-G955N, Can it be done?
There are no clickable options when I access the service menu.
Click to expand...
Click to collapse
Try Doctorsim
State.of.mind said:
Try Doctorsim
Click to expand...
Click to collapse
Thank you for the recommendation, I'm glad I tried this.
Unfortunately, they DoctorSim was unable to help me as my phone is on the t-moblie network but is not prompting an unlock code.
When I enter this code
*#2683662#
ServiceMode
Not supported
Mobile: null
Mobile_IMS: null
skyprotocol99 said:
Thank you for the recommendation, I'm glad I tried this.
Unfortunately, they DoctorSim was unable to help me as my phone is on the t-moblie network but is not prompting an unlock code.
When I enter this code
*#2683662#
ServiceMode
Not supported
Mobile: null
Mobile_IMS: null
Click to expand...
Click to collapse
No problem. Hmm maybe you will have to do it through T Mobile? I recall that Doctorsim took a long time to work, but it was guaranteed for the phone to be unlocked. Also, did you purchase the premium?
Try
Support.t-mobile.com/docs/DOC-27772
---------- Post added at 03:14 PM ---------- Previous post was at 03:09 PM ----------
On second thought maybe it cannot be done. I pulled this from a previous XDA thread. Source: https://forum.xda-developers.com/galaxy-s8+/help/ive-korean-model-s8-questions-t3590720
"*Since September 2013, Samsung has implemented a 'region lock' on all new stock.
For correct operation, this handset should be activated inside one of these countries with a SIM card issued for use there. The device will then be able to accept SIM cards from outside of these countries.
Activation requires turning the device on for the first time & completing set-up with the SIM installed, then completing at least 5 minutes of voice call(s) with this SIM.
Without activation you may still use the device outside of these countries when 'roaming' - using a SIM card from the listed countries.
If this activation procedure is not followed then the device will lock when first attempted to be used with a SIM card from outside of these regions. Local Samsung support may provide a code to unlock such handsets.
**All member states of the E.E.A and the following additional territories: Albania, Andorra, Bosnia and Herzegovina, Former Yugoslav Republic of Macedonia (F.Y.R.O.M), Monaco, Montenegro, San Marino, Serbia and Vatican City.
From what i understand you might need a sim from Korea to activate it once activated it will work worldwide with any sim card. i could be wrong but that’s how i think it works!"
Another user stated that "Confirmed I had to have my SM-955N unlocked and used in Korea before shipping. Also have the KT logo. Back is actually less busy than other versions without all the FCC, CE etc logos."
Thanks for the help with this!
I am considering mailing the phone to Korea to have someone there do the sim card activation.
But before I do this I want to make sure I understand the lock issue.
The phone does not actually give me a "LOCKED" message, and it partially works T-Mobile, it just does not pickup all the LTE bands, so it only has a connection about 50% of the time. Tmobile recently changed their bands, a month and a half ago it was working perfectly. The main goal is to turn on the locked bands.
If I'm understanding correctly if I take the phone to Korea, use a sim card from there on it, and make calls, then I go back to T-Mobile it will trigger the unlock mesage, which will allow me to access the LTE bands in *#2683662#??
Have you solved this yet?
skyprotocol99 said:
Thanks for the help with this!
I am considering mailing the phone to Korea to have someone there do the sim card activation.
But before I do this I want to make sure I understand the lock issue.
The phone does not actually give me a "LOCKED" message, and it partially works T-Mobile, it just does not pickup all the LTE bands, so it only has a connection about 50% of the time. Tmobile recently changed their bands, a month and a half ago it was working perfectly. The main goal is to turn on the locked bands.
If I'm understanding correctly if I take the phone to Korea, use a sim card from there on it, and make calls, then I go back to T-Mobile it will trigger the unlock mesage, which will allow me to access the LTE bands in *#2683662#??
Click to expand...
Click to collapse
Just curious if you found a solution to this yet?
I read all the posts about how a phone branded and bought in Korea needs to be on a Korean simcard for at least 5 min or so before it will accept any other (non-Korean) simcards.
So since I was based in Korea I bought the S8+ (SM-G955N - 128GB/6GB version) in Korea as soon as it was launched in April 2017 and used it with my Korean telecom provider (KT Telecom) for over half a year. In that period, while travelling outside Korea, roaming on LTE in different countries was never a problem.
Recently, I have moved from Korea (to Europe) and got a local simcard (Vodafone - NL). I can get on my provider's network, receive/send calls/sms, etc. No problem, but no LTE! Only some 3G/Edge!
I tried the 'service menu' with *#2683662#, access is possible but it gave back the same:
ServiceMode
Not supported
Mobile: null
Mobile_IMS: null
So first I thought it was related to KT Telecom how their GiGA LTE technology is somehow dependent on the use of a KT Telecom simcard with the KT Telecom network and basically without the KT Telecom simcard, basic LTE functionality would stop.
So I am reading through the different internet forums and advice from other users, but as far as I can tell, I don't think there is any other solution for me then to flash my phone with a less 'Korean-ized' stock firmware and hope this will resolve my problem.
Since, technically my phone is still under warranty, I am a bit taken back with all the extensive 'liability waivers' and step-by-step instructions. Rooting and flashing my phone is my last resort option.
I am just wondering if there are any other SM-G955N users out there who encountered the same problem and made some progress in any other way. Any feedback or comment is mostly appreciated.
I picked up a Korean G930S that had Chinese CSC, and I put an F ROM onto it. The CSC did not change. Here in the US the Chinese CSC worked just fine on the AT&T service getting 4G/LTE. I flashed an XAA CSC (probably not the correct one now that I think about it), which would not connect up.
I restored the phone back to the F ROM/Chinese CSC setup and don't worry about it at this point.
As I understand so far, what ever phone 'ROM version' you have is the CSC you will need to flash, meaning if you have an F ROM for example,you'd need to flash a CSC package that is 'made' for F ROM's. My 8+ went from an International 8+ 955F to look like and ROM function as a Note 8,so I needed a Note 8 CSC if I cared to have that 'match' more specifically to my local carrier, AT&T.
I can't say that the XAA Note 8 CSC works any better than the original 955F International CSC with AT&T, or not.
For my 8+ F, I flashed a Note 8 ROM, and wanted to find a Note 8 CSC (US) package for the phone, as I wanted the CSC to match where I live.
It wasn't really necessary, as the phone had an F (International unlocked CSC sorta thing stock on it) whick worked just fine here in the US. Never the less, I found the correct Note 8 CSC and set that up correctly with an XAA CSC, and it works just fine, as well.
test
Hodori75 said:
I read all the posts about how a phone branded and bought in Korea needs to be on a Korean simcard for at least 5 min or so before it will accept any other (non-Korean) simcards.
So since I was based in Korea I bought the S8+ (SM-G955N - 128GB/6GB version) in Korea as soon as it was launched in April 2017 and used it with my Korean telecom provider (KT Telecom) for over half a year. In that period, while travelling outside Korea, roaming on LTE in different countries was never a problem.
Recently, I have moved from Korea (to Europe) and got a local simcard (Vodafone - NL). I can get on my provider's network, receive/send calls/sms, etc. No problem, but no LTE! Only some 3G/Edge!
I tried the 'service menu' with *#2683662#, access is possible but it gave back the same:
ServiceMode
Not supported
Mobile: null
Mobile_IMS: null
So first I thought it was related to KT Telecom how their GiGA LTE technology is somehow dependent on the use of a KT Telecom simcard with the KT Telecom network and basically without the KT Telecom simcard, basic LTE functionality would stop.
So I am reading through the different internet forums and advice from other users, but as far as I can tell, I don't think there is any other solution for me then to flash my phone with a less 'Korean-ized' stock firmware and hope this will resolve my problem.
Since, technically my phone is still under warranty, I am a bit taken back with all the extensive 'liability waivers' and step-by-step instructions. Rooting and flashing my phone is my last resort option.
I am just wondering if there are any other SM-G955N users out there who encountered the same problem and made some progress in any other way. Any feedback or comment is mostly appreciated.
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I have family members visiting from Korea, and they have the same phones. I was trying to set them up with US Mobile which is a T-Mobile's MVNO. So initially, I've faced the same issue as you, where I was only getting the voice calls working and no data. I was able to download an app called Force 4G LTE from the app store that let me change the radio network setting to LTE Only (or other options that include the LTE band). That fixed the data issue and I was getting LTE from that point.
The next problem I ran into, however, was the voice. When LTE is on and working I was no longer getting voice calls (both outbound and inbound). And when I switch it to some non-LTE radio band to turn on the 'Edge' signal back, voice worked again. I chatted with a US Mobile's service representative for a while to try to fix the issue -- in the process also tried turning off HD Voice / VoLTE option -- VoLTE wasn't working for me anyways since I am not using T-mobile's service directly. But that didn't resolve the issue either. After many different tries -- I had to eventually just give up and tell the family member to stick to internet calling for their duration of the visit.
The problem seemed to be that the phone couldn't simultaneously use LTE for data and Edge for voice and was connecting to either LTE or Edge for both.
I'm curious about this as my Korean Note 8 did not need local activation, and with all the research I found Korean models are never SIM or carrier locked and do not require regional SIM activation like the F variants.
As far as using a 935N on tmobile in the USA as long as it supports LTE bands 2,4 and 12 it should work fine. Out of the box my Note 950N worked on LTE and by manually enabling IMS and RCS in the IMS Settings app, VoLTE worked too.
I have since created a CSC patch that changes the CSC to T-mobile to make the phone features more applicable, and add T-mobile's wifi calling but I'm fairly sure the S8+ is basically the same hardware as a Note 8 so if all you need is LTE data and voice calling you shouldn't need to flash anything.
To correct a misinformation about CSC per device, they are not platform specific. My T-mobile patch uses a mostly stock 950U T-mobile CSC base, and I can tell you that there is nothing in the CSCs themselves that has anything to do with Exynos or Snapdragon.
I have the same problem
I have the same problem
Vicious_jm said:
I have a SM-G955N Korean model I bought from eBay. Everything works except Mobile Data. I call ATT (my service) got connected with their Advance Division, and they not did help.
We tried setup a new connect under Access Point Names with no luck. I did notice that more ATT type APNs did add to the list of APNs, I tried each and powered off the phone each time, no luck.
My Wi-Fi works just not the Mobile Data. I typed in the Service Mode code which I got from another thread *#2683662#,(thanks XDA Developers), what I got looks like this:
MAIN MENU
[1] Protocol
[2] UE Setting & Information
[3] ETC
MOBILE: null
MOBILE_IMS: null
When I access The 1,2,3 pages I always get the MOBILE: null and MOBILE_IMS: null at the bottom of every page. My guess these are error codes.
Any help or ideas would be great.
Thank you.
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Here's some more information about this issue.
https://forum.xda-developers.com/showpost.php?p=81262805&postcount=18