Develop Bugs

Cannot find network abroad

I have an unlocked t989 that I gave to my friend who was visiting me at the states. At the time in the states we put his Taiwan SIM card and it can receive phone calls. Upon returning to Taiwan the same SIM card can no longer make or receive calls. It cannot connect to any network. Try the manual and automatic network search but still cannot connect. Tried a bunch of different active Taiwan company SIM cards and only one SIM (Vibo or something) was able to connect to the network. All the SIM cards are confirmed working when used on any Taiwan phones.
Apn settings are blank except with US T-Mobile SIM card or Vibo SIM card.
I tried to use app "SIM card info" and it couldn't read any info from the SIM card except T-Mobile and Vibo.
Need some ideas as to what could be wrong. Thanks
Phone:
T-Mobile galaxy s2 t989
CM 10.1.0
Unlocked (confirmed by making a call on Taiwan SIM card Vibo)
Sent from my SGH-T889 using Tapatalk 2

Issues with sim2 on s HTC one M8 dual sim

Hello
I hope this is the right place to ask and I feel at this point I have been searching Google dry over the past week.
I have a HTC one m8 with dual SIM, as I live in Sweden and work in Denmark, I have a Swedish tre.se in SIM1 and then a Danish 3.dk in SIM2
While I'm in Denmark, both SIM card works and connects to their network, but the second I enter Sweden, SIM2 won't find a connection.
I tried to switch the two cards, but then it's just the Swedish card in SIM2 that won't connect.
From what I have been able to Google , SIM2 should only be using 2g network, but this should be a problem for either of the subscriptions as far as I know.
Is there some special trick, setting or some I need to do to make it connect to 2g
It is original OS on it. I unfortunately can't root it, as my company mail will detect it and block my access. (Worx home by Citrix + touchdown)
What I have tested so far:
Factory reset of the phone.
New SIM card for both cards.
Activate and deactivate flight mode.
Deactivate and activate each SIM from the dual SIM manager.
Switch cards in slots (1->2 and 2->1).
Disable SIM1 ( SIM 2 still didn't connect)
I have also contacted each phone company, but they were to no use and just said it should work hehe
Any suggestions or ideas ? I'm open to all suggestions that doesn't involve getting another phone
Also this is not one of the cheap Chinese dual SIM versions.
Thanks

I may have managed to get a little closer to the cause.
It seems that SIM2 is actually only running over GSM / 2G for god knows what reason, and that is not supported by my phone company i Sweden, which is why it only works in Denmark.
I will try with another phone company called TDC and see if they have the same issues over there or else its bye bye useless dual sim

WP 10 and Dual Sim - trouble with Data in Slot 1

Hello,
I figuerd out a curiousity with WP10 and Dual Sim phones. I have a Lumia 640 and 2 Lumia 950 here. One L950 has a SIM Card from Vodafone and run perfect in SIM Slot 1. Data work fine when Wlan is of from 2G to LTE as it should be. In the L640 and the other L950 I use SIM Cards from Provider Telekom / Congstar (which is also Telekom and use same network). Both phones are not able to provide any Data connection when the SIM card is in Slot one while both connect imeditaly once I move the SIM card in Slot 2
I won't care at all to use Slot 2 instead of Slot one but all contacts are without SIM card then and you have to switch all manualy to SIM 2 which is anoying. I verify that I use the exact same settings on Slot 1 and Slot 2 and I also switch back the card but again no Data in Slot. I already find some user with simmilar Problem but nobody had a better solution then to switch to Slot 2. Does anyone here run into simmilar trouble and / or have an idea how to fix that bug?

which sim did you choose for the data connection? 1 or 2

I select 1 once I had the sim in slot1 and 2 when the sim was in slot2. However, with the latest update on fastring it is fixed on the lumia 640 and it has now data in slot 1 as it should be. Unfortunatly the 950 dont take the update. I read that a factory reset can fix it !?

I was traveling recently to Poland and had that exact issue. Polish SIM in SIM1 slot, my homeland SIM in SIM2 and I had issues with getting a data connection. Swapped the PL SIM to SIM2 and it worked.
Issue now resolved with the latest update. Why don't you just enrol your 950 into the slow ring and get the updates?

GOgzs said:
I was traveling recently to Poland and had that exact issue. Polish SIM in SIM1 slot, my homeland SIM in SIM2 and I had issues with getting a data connection. Swapped the PL SIM to SIM2 and it worked.
Issue now resolved with the latest update. Why don't you just enrol your 950 into the slow ring and get the updates?
Click to expand...
Click to collapse
I already have my 9650 on the fast ring but no update appears. WIll try the slow ring now, maybe it apperars then. Some Boards already reprot that MS has trouble to provide the update to 950 / 950XL

Dual SIM issue

Hi, I have a A4 lite with latest patches febraury) installed.
since 2 weeks I have a second sim card and it worked fine until a few weeks ago.
my setup is
voice and text message sim1
Data Sim 2
since a few days I'm not reachable on sim1 but on sim 2, only if I switch data to sim1 too, I'm reachable again on my mobilenumber.
I changed the simcard already and got a new one from provider but this did not help.
However I recognized when I switch sim1 to only 3g not 4g it works.
so what could be the issue, and do you think it is a provider ot HW issue?
thanks in advance
brgds

Network not working suddenly

Hi, I'm facing a serious problem with my Redmi Note 9 pro max. Suddenly the SIM cards are not detected (Both sims). Sometimes i get only 2g network in my 1st SIM. I have a Airtel sim on SIM 1 and JIO on SIM2. I tried using other sim cards as well but nothing seems to help. It just happened suddenly. The phone is brand new. I can't flash using flash tool because it needs sim card to send some info in developer options. I need help!