[Q] My galaxy s5 (au SCL23) urgently need help... - Galaxy S 5 Q&A, Help & Troubleshooting

i have bought samsung galaxy s5 (SCL23 by au /SM-G900J) from Japan.i have used that handset in bangladesh with Grameen phone network (GSM). After using 8 day the handset took automatic update via wi-fi. And after taking restart... the network was gone. Now its showing out of service sign instead of network. But sim menu is available in menu. When i wants to use settings>more network>mobile network..handset shows "insert sim card to access network services". Out going and incoming call is off. I can't use mobile data. Now what can i do to recover the network? pls help me.......thanks in advance...

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[Q] Problem with data on sim unlocked galaxy s5

I paid to get a T-mobile galaxy s5 sim unlocked so that I could use it on At&t. I'm located in the US. I took the sim out of another non-functioning at&t galaxy s5 and put it in the t-mobile one. The sim unlock code was successful, and ever since then my calls and texts have been working just fine. However, the mobile data connection is not working and I cannot seem to ascertain why this may be. I have tried scanning for networks and automatic network selection through the settings --> more networks --> Network operators menu. Mobile data is enabled. I have a data plan through at&t. Wi-fi still works. Any ideas on how to fix this issue? Any help would be greatly appreciated. I was hoping that rooting the phone may help the issue, but I am new to this concept. As I have gathered, only certain models of s5 can be rooted as of yet, and I did not find a thread on rooting the G900T model for the s5's. Thanks for any help!
I think you must set the APN from Setting. Ask the AT&T providet for the APN.

Samsung Galaxy S6 Edge+ Data Connection

Hello
I bought a Samsung Galaxy S6 Edge+ when i was in USA it was from Sprint,now i am in Macedonia and i unlocked the phone,and it was all good but Data Connection won't work i fixed APN but still won't work,i can't choose network operators,the phone data works with Macedonian VIP sim card but won't work with t-mobile and every time i turn on mobile data it shows an small window where it says (Unable to establish a wireless data connection LTE: ESM - 29 EMM - x)
Thank You..
Bump. I'm in a similar boat. Sprint phone unlocked. But now using an ATT sim, Phone works but data is a no go... Somebody with their MSL # able to assist? Its our data profile, and it needs to change the way it "dials" out of the phone. But without anything to compare it to, its impossible.

Mobile network state disconnected?

Hello guys. After paying off the remainder of my S8's bill on sprint they unlocked it (or so they said). I then used your guide to install Samsung and at&t's firmware. From there I went to an at&t store, bought an at&t go phone sim card, installed it, activated their service and changed my number. LTE works fine, but I don't think 2g and 3g are working.
1. Under sim card status it says disconnected mobile network state. My IMS registration status is not registered either.
2. Under connections - mobile networks - network operators at&t - search for at&t microcell it says "Failed to connect to mobile network via at&t MicroCell. Try again.
3. Under connections - mobile networks - access point names it says "ATT Nextgenphone", that's all. I would of thought more options would be here. ?
According to the app open signal my phone never uses 2g or 3g.
Please let me know what I should do next. Thank you.

Voice calls not possible on Lebara network Australia

I've got a very weird issue with my Galaxy S8 (SM-G950FD)
After working fine for about 1.5 years on the network it suddenly wasn't able to make and receive calls anymore on the Lebara (Vodafone) network in Australia.
The issue spontaneously disappeared a few hours after it first surfaced but reappeared and has not gone away since.
Internet and Txt/MMS are working normally. But when someone calls me it goes straight to voicemail and when I call nothing happens for a minute or so and then it "disconnects" but no tone
When I go into the phone app and try to retrieve settings like caller ID and/or forwarding it gives the following error:
Failed to read data
Something went wrong. Check your
Sim Card or network connection,
then try again
When I insert the sim into an S7 it's working. When I insert the sim from the S7 into the S8 (Optus network) the S8 works as well.
I've performed a factory reset (without restoring the settings)
I've gotten a new sim and Lebara has ported the number to it but that didn't help
Being a dual sim I've tried using the shared sd/sim slot but same issue.. data/mms/txt working no voice.
I've tried copying the apn settings the S7 displays with the Lebara sim to the S8 but that didn't help either.
I've now used Odin to flash the phone back to the Oreo version with the December 2018 security update and that didn't help either.
Any other ideas?
Thanks
I've managed to narrow down the issue a bit.
Also went out to purchase a Vodafone Pre-paid sim. That one didn't work either at first but after some troubleshooting with support of Vodafone we've found out that the S8 doesn't connect to the 3G network of Vodafone Australia.
When I have the SIM of another provider in there and limited the network mode to 2G/3G autoconnect the phone just finds the 2 other networks on 3G (AFAIK 2G has been phased out).
I've tried to get into the advanced service mode but this doesn't seem to be possible anymore.
Is there a way to try to see which bands are active on the S8 and better yet enable them all?

My galaxy s8 shows Emergency call only on sim 2.

Hello there!
Can anyone please tell me why my galaxy isn't connecting even 2g network or gsm to call . While it only connects umts.
In about/status /sim card info. It shows edge network. But in service it shows out of service.
On other hand if i use my sim card on another phone it works fine.. with gsm gprs edge and 3g also.

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