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[CLOSED][Q] Unlocked Relay getting no signal on a non-TMo carrier

EDIT: No feasible solution found, so I had the device sold. Question closed.
UPDATE ON THE ISSUE: It seems that it would not recognize WCDMA networks (GSM works properly), hence no signal on my WCDMA-only SIM card. Any ideas?
Hello all, new joining the Relay 4G forums
Long story short, so I got my Relay 4G today, but it just wouldn't fully recognize my China Unicom SIM card. Symptoms and information:
1) No signal
2) Correctly displays my carrier's name, but says "emergency calls only"
3) Can search for available carrier networks, including China Unicom, but fails to register on the network - it says "unable to connect, try later"
4) The device has a correct IMEI instead of a generic one
5) Doesn't prompt me to enter SIM UNLOCK CODE when I first plugged in the SIM card
6) SIM unlocking procedures posted in the forum doesn't help - the phone should be unlocked when I bought it
7) It recognizes another SIM card from China Mobile (WTF!!) and works properly
8 ) China Unicom uses the 2100MHz band, which is supported by Relay 4G
So now I'm out of ideas... Any help would be appreciated. Thanks
Sent from Google Nexus 4 @ CM11

See this thread for sim unlock. http://forum.xda-developers.com/showthread.php?p=40835465

croogrog said:
See this thread for sim unlock. http://forum.xda-developers.com/showthread.php?p=40835465
Click to expand...
Click to collapse
...So this phenomenon means this really is SIM-locked? Good, I'll revert to ICS and try unlocking with that method...
One question: why doesn't it prompt me to enter unlock code when I inserted the SIM?

@croogrog It didn't turn out to be that simple... SIM unlock procedures didn't work at all even though I got all the timings right. I think the problem isn't caused by SIM lock... But what can it be?
Sent from Samsung Galaxy Nexus @ CM11

Bump
Sent from Google Nexus 4 @ CM11

More strange symptom: another SIM from China Unicom got recognized quickly after I inserted it. I don't understand this...
Sent from Google Nexus 4 @ CM11

If other SIMs are working and you are able to call someone your phone was unlocked when you got it.
If your SIM isn't working it could be that you need a new one from your provider.
I had that problem years ago. My phone was too new ...or my card too old.
SGH-T699 (Relay 4G) Talk with a little Tapa

C3POID said:
If your SIM isn't working it could be that you need a new one from your provider.
Click to expand...
Click to collapse
Hmm, my not-working SIM is bought just days ago... I'll go to my carrier's deck and see if they could swap me a new card.
Sent from Google Nexus 4 @ CM11

AndyYan said:
I'll go to my carrier's deck and see if they could swap me a new card.
Click to expand...
Click to collapse
Good luck.

AndyYan said:
Hmm, my not-working SIM is bought just days ago... I'll go to my carrier's deck and see if they could swap me a new card.
Sent from Google Nexus 4 @ CM11
Click to expand...
Click to collapse
Where did you buy the phone from?

gtmaster303 said:
Where did you buy the phone from?
Click to expand...
Click to collapse
From a local importer at TaoBao (China's equivalent of eBay).
UPDATE ON THE ISSUE: I changed my SIM card for a new one at my carrier's but still won't recognize. Adding in the symptom that it can recognize another China Unicom SIM, I guess I can conclude that the problem lies within this particular SIM.
Sent from Samsung Galaxy S Relay 4G @ CM11

AndyYan said:
From a local importer at TaoBao (China's equivalent of eBay).
UPDATE ON THE ISSUE: I changed my SIM card for a new one at my carrier's but still won't recognize. Adding in the symptom that it can recognize another China Unicom SIM, I guess I can conclude that the problem lies within this particular SIM.
Sent from Samsung Galaxy S Relay 4G @ CM11
Click to expand...
Click to collapse
Best test would be to try another carrier sim all together. Not china unicom. See if the phone takes it. That way you will know for sure that it's unlocked and works. Unfortunately, there's no way to check if it's unlocked, other than to test sim cards
My next suggestion would be to consult samsung for a warranty repair, because your phone might be faulty. Or consider asking the seller that you got it from to send you another one. Let us know if you still need help
Sent from my Galaxy S Relay

gtmaster303 said:
Best test would be to try another carrier sim all together. Not china unicom. See if the phone takes it. That way you will know for sure that it's unlocked and works. Unfortunately, there's no way to check if it's unlocked, other than to test sim cards
My next suggestion would be to consult samsung for a warranty repair, because your phone might be faulty. Or consider asking the seller that you got it from to send you another one. Let us know if you still need help
Sent from my Galaxy S Relay
Click to expand...
Click to collapse
1. I checked with a China Mobile SIM and it works. Also, as said before, another China Unicom SIM also works. Only this specific SIM doesn't. It IS unlocked when I purchased it.
2. No way for a warranty - I'm in China and this is a T-Mobile USA device that many local "smartphone gurus" haven't even heard of, let alone "repairing" it.
3. The importer only has one such device in perfect condition (others have plenty of worn and torn), so exchanging is not possible...
I'm thinking of setting up an alternative solution for now...

More update on the issue: even on the China Unicom SIM that got recognized, it wouldn't connect to WCDMA/HSPA+ networks. Did an experiment: I used *#*#4636#*#* to adjust network modes, and when the device is on GSM only / GSM/WCDMA auto / WCDMA preferred, it would receive signal like normal; however, choosing WCDMA only, no signal is received. It seems like the real issue lies within the device after all...
Sent from Samsung Galaxy S Relay 4G @ CM11

...The Relay isn't a WCDMA device.

Even though the relay is a US tmobile device i would still try to contact samsung. They may be able to help you and it can't hurt. This is certainly not the first Relay to leave the US and incur problems...
Sent from my Galaxy S Relay

Jax184 said:
...The Relay isn't a WCDMA device.
Click to expand...
Click to collapse
What? I mean, my carrier has the HSPA+ 21Mbps/42Mbps it supports... What do you mean by it not supporting WCDMA?
Sent from Samsung Galaxy Nexus @ CM11

AndyYan said:
What? I mean, my carrier has the HSPA+ 21Mbps/42Mbps it supports... What do you mean by it not supporting WCDMA?
Sent from Samsung Galaxy Nexus @ CM11
Click to expand...
Click to collapse
If I understand correctly, the network mode menu option for WCDMA in the CM10 ROM is left over from the D2, which is a phone of similar spec which our developers based our ROM on. It doesn't do anything on the Relay.

Jax184 said:
If I understand correctly, the network mode menu option for WCDMA in the CM10 ROM is left over from the D2, which is a phone of similar spec which our developers based our ROM on. It doesn't do anything on the Relay.
Click to expand...
Click to collapse
But it DOES switch network modes... Or so I think, judging from the symptoms.
The first SIM only supports WCDMA(HSPA+), and when inserted, it can find my carrier's network but can't connect. On the second SIM which is compatible with both GSM/WCDMA, I lose signal only when "WCDMA only" is chosen, and under this situation the symptom is same as above. I assume that it can find my carrier's GSM network but not the WCDMA one.
Sent from Samsung Galaxy Nexus @ CM11

Bump in vain. I guess I'll be selling this phone if the issue is really within the phone itself...
Sent from Samsung Galaxy Nexus @ CM11

[Q] Using the verizon variant internationally

Hi,
Just bought today the verizon variant of the galaxy s6, and I need help with a couple of questions:
I'm moving to Europe in the near future, would I still be able to use the phone?
From who do I get software updates? Will I get updates from verizon even if I'm abroad?
Would it be able to flash international firmware on this phone in the future? Are the models fundamentally different from each other or are they just handicapped by firmware?
Thanks in advance

yuviyuval said:
Hi,
Just bought today the verizon variant of the galaxy s6, and I need help with a couple of questions:
I'm moving to Europe in the near future, would I still be able to use the phone?
From who do I get software updates? Will I get updates from verizon even if I'm abroad?
Would it be able to flash international firmware on this phone in the future? Are the models fundamentally different from each other or are they just handicapped by firmware?
Thanks in advance
Click to expand...
Click to collapse
Yes it works internationally, I'm using it on GSM right now and plan to use it in Egypt over the summer. You will get updates but I think verizon needs a verizon sim to check for updates but when one releases you can always check through a computer if you need to. As far as I know verizon one is the bay because it supports CDMA radios and GSM radios and comes pre unlocked while other versions like tmobile only support gsm. That's the only hardware difference, the rest is all software.
Also be careful with your phone! Nor sure where in Europe yuppie going but some classes visited Spain recently and lots of them we're pickpocketed and had something stopen.
Sent from my Verizon S6,
formerly abdel12345

supersmash19 said:
Yes it works internationally, I'm using it on GSM right now and plan to use it in Egypt over the summer. You will get updates but I think verizon needs a verizon sim to check for updates but when one releases you can always check through a computer if you need to. As far as I know verizon one is the bay because it supports CDMA radios and GSM radios and comes pre unlocked while other versions like tmobile only support gsm. That's the only hardware difference, the rest is all software.
Also be careful with your phone! Nor sure where in Europe yuppie going but some classes visited Spain recently and lots of them we're pickpocketed and had something stopen.
Sent from my Verizon S6,
formerly abdel12345
Click to expand...
Click to collapse
So just to clarify, I can just purchase an EE nano sim card from amazon, take my s6 to london, pop it in, and it should work? I don't have to call Verizon before hand to get it network unlocked?

voldyy said:
So just to clarify, I can just purchase an EE nano sim card from amazon, take my s6 to london, pop it in, and it should work? I don't have to call Verizon before hand to get it network unlocked?
Click to expand...
Click to collapse
Correct. You may have to set up apns for data though. But text and voice should work out the box.

What can I do to use the GSM network, 3G !!!!
I live in china

zintung2911 said:
What can I do to use the GSM network, 3G !!!!
I live in china
Click to expand...
Click to collapse
3G only for China Unicom. Add the APN of Unicom and then H+ will work.

voldyy said:
So just to clarify, I can just purchase an EE nano sim card from amazon, take my s6 to london, pop it in, and it should work? I don't have to call Verizon before hand to get it network unlocked?
Click to expand...
Click to collapse
920V is different from the international version. It supports very few LTE bands and i'm not sure it supports as many 2g/3g bands as the internation one. you may have voice but you won't have LTE.

toskabab said:
Correct. You may have to set up apns for data though. But text and voice should work out the box.
Click to expand...
Click to collapse
Hi,
Didn't u have the same issue with texting?
I bought my s6 from verizon on a trip in the USA, but I live in UK and using 3 network. The only issue is the texting. I spent lot of time to figure out what is the real problem, and it seems like it is sort of prefix problem. If I receive message from someone with new number with +4407 (obviously all of them start) and I reply, message is not going to be sent and I always get a message: " Your text to speech message to 0114407..... has been rejected by recipient phone." I never use text speech btw, and it definitely prefix problem because if I send to 07... only they receive it. I changed all my contacts to 07... but still after that I couldn't reply to messages for a long time just only with the Handcent next sms app. But If I receive a new message from a new number I'll get with +447.. and I need to save it and change the number to 07.. otherwise it will never work. I found some people had the same issue in the past, but there was no final solutions: http://forum.xda-developers.com/showthread.php?t=2106370
http://thedroidguy.com/2015/07/solutions-for-samsung-galaxy-s4-sms-mms-problems-part-2-110209
I am just wondering how is this gonna work abroad if I even can't use in the UK. I rooted and put clear rom, but still same.

toskabab said:
Correct. You may have to set up apns for data though. But text and voice should work out the box.
Click to expand...
Click to collapse
How do I add a new APN? I found Settings -> Mobile networks -> Access Point Names but the "Add" button is greyed out

I am seeing it greyed out as well. I was planning on getting UK 3 sim cards for our trip next year.
Sent from my SM-G920V using XDA Free mobile app

Galaxy S6 "NO SERVICE"

Utter bullS**t
I am sorry for this rant but this is absolutely Messed up.
Got a new phone that doesnt even hold or lock on to a Network Signal for more than 10 mins. Not a carrier version.
Is this a common and known problem? OR did i just got unlucky and got the Lemon.
Anyone having the Issues

Have you got the correct APN settings installed?
Sent from my SM-G920F using XDA Free mobile app

How's the signal on other phones where you are? Have you tried different sims from other carriers? Are you sure the variant you have is compatible with the bands in your country?
If everything looks good from your end, like good signal on another phone with the same sim, and you know the phone supports the correct bands, it's a lemon.

ejmjs said:
Have you got the correct APN settings installed?
Sent from my SM-G920F using XDA Free mobile app
Click to expand...
Click to collapse
Hi, yes Its APN are correct, I have checked with the Service Provider.

mupet0000 said:
How's the signal on other phones where you are? Have you tried different sims from other carriers? Are you sure the variant you have is compatible with the bands in your country?
If everything looks good from your end, like good signal on another phone with the same sim, and you know the phone supports the correct bands, it's a lemon.
Click to expand...
Click to collapse
I was on Nexus Before, Signal use to be perfect, untill i switched to this phone. It gets signal for a while then goes to "No Service" Its purchased in the country where I live. So its a local set and bands should be supported.

I have exactly the same problem. No solution found, what a piece of crap phone. :/

Nexus 5 has "No service"

I got this phone yesterday. It is currently running Android 6.0.1 and the status bar keeps saying "No service". I have tried using 5.1.1, as well - same message.
When I first got the phone, I tried rooting 6.0.1 with the latest SuperSU but resulted in a bootloop so I reset the phone + unrooted it with the Nexus Root Toolkit.
I have tried using my SIM on another person's phone - works perfectly.
I have tried using another person's SIM on my phone - "No service".
In the "About phone" section -> Status -> SIM status, the phone recognizes my phone number and IMEI number. So my phone knows there is a SIM there and everything, it just can't connect to the phone network for some reason.
What could possibly be the problem?

Has the imei been blacklisted? Have you tried searching for networks?

i been getting the same thing on and off since i had mine and seem stuck as well

What network are you using?? If its CDMA you have to get the imie# activated into the system by your wireless provider... So any Verizon/sprint for example you need to get that activated in their system.. Only GSM is plug & play at&t/t mobile
Sent from my Nexus 6 using Tapatalk

audit13 said:
Has the imei been blacklisted? Have you tried searching for networks?
Click to expand...
Click to collapse
My IMEI is not blacklisted according to protectyourdata.ca's IMEI checker.
gothicasshole said:
What network are you using?? If its CDMA you have to get the imie# activated into the system by your wireless provider... So any Verizon/sprint for example you need to get that activated in their system.. Only GSM is plug & play at&t/t mobile
Click to expand...
Click to collapse
I am using Bell. It is HSPA I think. The SIM card works with my Oneplus One, which hasn't had its IMEI # activated on their system.
I've decided to just return it and get a new one.

anon5 said:
My IMEI is not blacklisted according to protectyourdata.ca's IMEI checker.
I am using Bell. It is HSPA I think. The SIM card works with my Oneplus One, which hasn't had its IMEI # activated on their system.
I've decided to just return it and get a new one.
Click to expand...
Click to collapse
Hspa is a GSM technology.. Make 100% sure the nexus supports your radio bands.. I would honestly either try a nother sim card or call customer service.. Perhaps it could be a defective unit. Also make sure it fits 100% in the sim tray. I had that issue once with a sim that didn't quite snap into the sim tray
Sent from my Nexus 6 using Tapatalk

gothicasshole said:
Hspa is a GSM technology.. Make 100% sure the nexus supports your radio bands.. I would honestly either try a nother sim card or call customer service.. Perhaps it could be a defective unit. Also make sure it fits 100% in the sim tray. I had that issue once with a sim that didn't quite snap into the sim tray
Click to expand...
Click to collapse
I just checked and Bell requires phones to be 850 or 1900 MHz compatible. The Nexus 5 supports these frequencies. I tried my sister's and friend's sim cards and it still doesn't work.

anon5 said:
I just checked and Bell requires phones to be 850 or 1900 MHz compatible. The Nexus 5 supports these frequencies. I tried my sister's and friend's sim cards and it still doesn't work.
Click to expand...
Click to collapse
You might have a defective sim reader
Also get a can of electronics spray air.. Blow out the sim port. Don't use your mouth as saliva can corrode the connector and they can claim water damage
Sent from my Nexus 6 using Tapatalk

I use a nexus 5 on the bell network and everything works perfectly.

4G LTE on Sony Xperia XZ from the UK in US?

I'm not getting LTE on my Sony Xperia XZ with AT&T. I'm in the U.S but got the UK version from Clove UK because of the lower price and freebies with the preorder. The US and UK Sony Xperia XZ are the same model number and the whitepaper has all of AT&T bands. Both are F8331 meaning there is only one Single SIM version. However the most I get is HPSA (3G?). Calls work fine and voice is very clear and I get full bars, however I can't get LTE anywhere. My friend that is on AT&T and has an iPhone 6S gets LTE with no problem.
I'm thinking that it has to do with the LTE bands being disabled or because it is a UK phone. I understand not getting Wifi-Calling or VoLTE because I didnt get the phone from AT&T but rather unlocked. But I should be able to get LTE, I might be wrong though. Could I possibly get the problem fixed by flashing the phone to a U.S firmware maybe? If anyone could help I would appreciate it.

Got the same phone from Clove on AT&T and LTE is no problem. The issue is most likely IMEI related. I have been using Xperia devices on AT&T for years and this has given me issues in the past. IMEI numbers are recycled and since Sony phones are not carrier issued their IMEI numbers are not loaded in AT&T's database. It most likely is linked to a 2G or 3G device from years past. Give AT&T an IMEI number from an AT&T LTE phone and you will access LTE. Also check APN to see if it's correct.
Sent from my F8331 using XDA-Developers mobile app

Yes don't flash the US Firmware, you won't get the fingerprint scanner, I bought the US version of the phone and Flashed the UK version, instead of LTE now shows 4G but is the same just different nomenclature

I can't speak for other countries, but the Singapore firmware reports as LTE on AT&T. But, it doesn't work until you go to Settings -> More -> Internet Settings and let it download.
Then, if you go to Settings -> More -> Mobile Networks, you should see the different AT&T APN's.

augie7107 said:
Got the same phone from Clove on AT&T and LTE is no problem. The issue is most likely IMEI related. I have been using Xperia devices on AT&T for years and this has given me issues in the past. IMEI numbers are recycled and since Sony phones are not carrier issued their IMEI numbers are not loaded in AT&T's database. It most likely is linked to a 2G or 3G device from years past. Give AT&T an IMEI number from an AT&T LTE phone and you will access LTE. Also check APN to see if it's correct.
Sent from my F8331 using XDA-Developers mobile app
Click to expand...
Click to collapse
A million thanks. Everything you said was spot on. The IMEI as you said was not loaded into the AT&T database since the IMEI for my Xperia XZ is 14 digits vs 15 for an AT&T phone. I asked a friend for his IMEI and went to an AT&T store and did what you told and now I have LTE! Of course it appears as 4G on my Xperia but it's still LTE. Again thanks for your help.

peltruquin said:
Yes don't flash the US Firmware, you won't get the fingerprint scanner, I bought the US version of the phone and Flashed the UK version, instead of LTE now shows 4G but is the same just different nomenclature
Click to expand...
Click to collapse
Thanks for your help also. I figured that flashing the US firmware would disable the fingerprint scanner. My phone now shows 4G after I tried the solution to the first reply. Good to know it's the same as LTE. I don't regret buying the phone from the UK bc everything is working out fine.

twinkie said:
I can't speak for other countries, but the Singapore firmware reports as LTE on AT&T. But, it doesn't work until you go to Settings -> More -> Internet Settings and let it download.
Then, if you go to Settings -> More -> Mobile Networks, you should see the different AT&T APN's.
Click to expand...
Click to collapse
I tried what you suggested but it still shows 4G. The options are still the same. Apparently it is the same as LTE just shows up as 4G. Thanks though for the idea. It was worth a try.

In the UK LTE bandwidth is marketed as 4g.
You've purchased a UK Sony with UK firmware hence you will see a 4g symbol rather then LTE.

rmadrid7 said:
A million thanks. Everything you said was spot on. The IMEI as you said was not loaded into the AT&T database since the IMEI for my Xperia XZ is 14 digits vs 15 for an AT&T phone. I asked a friend for his IMEI and went to an AT&T store and did what you told and now I have LTE! Of course it appears as 4G on my Xperia but it's still LTE. Again thanks for your help.
Click to expand...
Click to collapse
My pleasure
Sent from my F8331 using XDA-Developers mobile app

peltruquin said:
Yes don't flash the US Firmware, you won't get the fingerprint scanner, I bought the US version of the phone and Flashed the UK version, instead of LTE now shows 4G but is the same just different nomenclature
Click to expand...
Click to collapse
How did you succed to flash without loader.sin for F83xx ?

enrique71 said:
How did you succed to flash without loader.sin for F83xx ?
Click to expand...
Click to collapse
Not sure what you are asking for, but I just followed the instructions from other post don't have the link at the moment, install xperifirm select the uk rom and it creates the ftf file for you, no need to worry about removing the xml file, I even forgot to put the phone on debugging mode it failed at first then I retried and it worked

peltruquin said:
Not sure what you are asking for, but I just followed the instructions from other post don't have the link at the moment, install xperifirm select the uk rom and it creates the ftf file for you, no need to worry about removing the xml file, I even forgot to put the phone on debugging mode it failed at first then I retried and it worked
Click to expand...
Click to collapse
Thanks, I figured it out. Appreciate the response. :good:

Thanks! That makes sense. Is there a way to test the speed? And so you are saying 4G is LTE, is that right? My XZ Premium, also from Clove, now says 4G so I should be good to go, right?