AT&T SIM won't work when it's not the SIM selected for data on 950 XL

constantreader16

New member
Jan 9, 2016
91
0
0
Visit site
I've got two SIMS on my 950 XL (US) and when I*don't have my AT&T*SIM as the main data*SIM it just doesn't connect at all.

This only started happening*in the last 2 days it seems. If I switch it to*the main*SIM, I get 4-5 bars of 4G/LTE. I haven't had much time to check how many places it does this. I will be able to try a little*bit more later today.

I'm on the release preview ring (this might've happened after the .594 update) and my firmware is up to date.

A few things I've*tried:
- Removing and reinserting the SIM card
-*Forced the phone to power down
-*Turned*airplane mode on and off
- Switched back*and*forth on which*SIM*handles data
- Turned that*SIM slot on and off
- Turned roaming off and back on

One thing I haven't tried is verifying APN settings, but*it was working at least for a couple weeks since I last wiped the phone (to leave the fast ring) without issue.
 

xandros9

Active member
Nov 12, 2012
16,107
0
36
Visit site
Windows Phone by default locks the secondary SIM to 2G. I heard that the Elite X3 lets the secondary SIM be 3G so it might be hardware or firmware related rather than a rule that W10M imposes universally.

Anyways, with that in mind, AT&T just shutdown their 2G network this past New Year's, give or take a day, and unfortunately it caused what you're seeing now.

So what to do about it right now? We can hope Microsoft issues a fix sometime in the future (no information yet) or switch out either the phone or carrier.
 

constantreader16

New member
Jan 9, 2016
91
0
0
Visit site
As a follow up, I ended up purchasing a OnePlus 3T. I really wanted to go with the Elite x3, but due to the huge difference in price between the two phones, it was too hard to justify the cost difference. I am however hoping for some sort of new HP pro-sumer device or Cerulean mobile device as both have been rumored as of late before the ultimate release of the mythical Surface Phone.

I wrote more in depth about it here
 
Last edited:

quek9

Member
Apr 1, 2012
129
0
16
Visit site
http://forums.windowscentral.com/microsoft-lumia-950-xl/449116-2g-t-goes-bye-bye.html

zei20t claims so but I can't confirm it personally only having AT&T service and no X3.
This really sux. I replied in the other thread regarding this. According to HP it defaults to 2g just like the 950s.

HP Elite x3 - Using Dual SIMs (Windows 10 Mobile) | HP® Customer Support

Does 2g, 3g, and/or 4g use the same antenna? Could a firmware update fix this? Why would Microsoft or anyone build a phone with 2g as the default?
 

nate0

New member
Mar 1, 2015
3,607
0
0
Visit site
This really sux. I replied in the other thread regarding this. According to HP it defaults to 2g just like the 950s.

HP Elite x3 - Using Dual SIMs (Windows 10 Mobile) | HP® Customer Support

Does 2g, 3g, and/or 4g use the same antenna? Could a firmware update fix this? Why would Microsoft or anyone build a phone with 2g as the default?
It is hard to say where a FW update would correct the issue if we are not aware of how the HW is configured or built in. But it would be the best approach.

Of course companies like T-Mobile have boasted that they will have 2G up until 2020 trying to claim the fall out of AT&T if possible.
 

quek9

Member
Apr 1, 2012
129
0
16
Visit site
It is hard to say where a FW update would correct the issue if we are not aware of how the HW is configured or built in. But it would be the best approach.

Of course companies like T-Mobile have boasted that they will have 2G up until 2020 trying to claim the fall out of AT&T if possible.

I might have to move one of my numbers to Tmobile. I will at least have 2g coverage for several more years.
 

Members online

Forum statistics

Threads
324,629
Messages
2,245,796
Members
428,215
Latest member
Xequetracyp