Develop Bugs

SIM lock

Sorry if there is a very obvious answer to this. I have a SIM lock on my simcard on my Desire so I have to input the PIN code when I switch it on. Occasionally, I get distracted and the SIM unlock keypad disappears before I put in the code. I have not found a way to get it back to input the code without switching the phone off and on again. Surely there's an easier way?

Just tested it on my phone, after the keyboard goes away I have the lock slider, and under the text "Drag down to enter PIN1 code"
Obviously dragging it down lets me enter the code.
You don't see the same screen?

Ah but I suppose my problem then is that I am running No Lock to avoid the lockscreen. I suppose there may not be another solution.

Reading this topic just reminded me to put a sim lock on my phone.
What is the initial SIM PIN when you have not set it yet?

Gana1991 said:
Reading this topic just reminded me to put a sim lock on my phone.
What is the initial SIM PIN when you have not set it yet?
Click to expand...
Click to collapse
Me too, just set my new PIN.
As for the initial PIN, it is 0000 for O2 UK but I think it is the same for other operators. You can always check it with your network operator.

1210 for T-Mobile UK, at least that's what mine was. Although it is an old one2one blue SIM.

SIM Suddenly Person Locked?!

"SIM Suddenly *Perso* Locked?!" <-- (Thread Tittle Typo)
Hello XDA. Mayhaps you can help me solve a problem that came out of literally nowhere.
I'm using an AT&T Galaxy Note II on Metro PCS with Cyanogenmod 13, and I have been using this setup for a few months now with almost no issues. Now don't get me wrong, I've had some hiccups here and there. Random reboots, camera issues, once I even lost ALL of my personal data for seemingly no reason at all.
Right this very moment, however, my phone just randomly rebooted, which I'm used to, but upon unlocking my phone after startup all I get is "Unlock Sim Network Pin" - "Sim Perso Locked Emergency Calls Only"
I have NO idea what is going on or why this happened in the first place. I don't have the slightest clue on how to fix this at this hour other than paying for an unlock code from a third party, but there's no way I'm doing that! Please help.
TL;DR
My phone rebooted and now the SIM is locked for no reason. Pls hlp

How did you sim unlock the phone in order to use Metro PCS? You mean the sim is locked in that the sim card is asking for a pin?

audit13 said:
How did you sim unlock the phone in order to use Metro PCS? You mean the sim is locked in that the sim card is asking for a pin?
Click to expand...
Click to collapse
When I bought the phone off of a friend they asked at&t to unlock it and they obliged.
Yes, that's exactly what I mean. Every time I restart the phone it asks for a pin to unlock SIM.
I'll update with screenshots.

Once the phone is unlocked via code, it should be permanently network unlocked. Do you still have the unlock code?
If the sim is asking for a pin, sounds like a setting in the security may have been changed to prompt for a pin. Did you try entering 1234 or 0000?

Same thing just happened to me, what was your solution? Phone worked fine yesterday, powered down from battery use, when I plugged it back /charged it, it was doing the perso lock thing.

[Paranoid Android 7.2.1] - Phone can not detect associated phone number with SIM card

Hey all,
This may or may not be ROM specific, but I just switched carriers and for the time that my number was being ported, I had both my old SIM card (Net10 on AT&T towers) and my new SIM card (T-Mobile) in the phone. During that crossover time, everything worked fine. In the SIM settings page, the carrier for each SIM and the associated phone number appeared correctly. However, once I removed my old SIM (phone was powered down any time I changed SIMs) the phone still functions fine for calls, texts, and data, but it no longer recognizes the SIM carrier or phone number.
This is made worse, as the carrier has an app that checks the SIM card before running, now, the app just shows "We do not recognize your SIM card".
I also noticed that carrier specific dialer codes no longer function. For example, if you dial #264# you should be presented with the status of T-Mobiles "Binge On" feature, but now it just does nothing once I hit call.
I have tried swapping the SIM between slot 1 and slot 2, I have also tried rebooting numerous times, all to no avail. I'd really prefer to not have to switch ROMs, but if that ends up being the solution, I guess I'll do it.
Any help would be appricated.
Thanks,
Austin

saleenman95 said:
Hey all,
This may or may not be ROM specific, but I just switched carriers and for the time that my number was being ported, I had both my old SIM card (Net10 on AT&T towers) and my new SIM card (T-Mobile) in the phone. During that crossover time, everything worked fine. In the SIM settings page, the carrier for each SIM and the associated phone number appeared correctly. However, once I removed my old SIM (phone was powered down any time I changed SIMs) the phone still functions fine for calls, texts, and data, but it no longer recognizes the SIM carrier or phone number.
This is made worse, as the carrier has an app that checks the SIM card before running, now, the app just shows "We do not recognize your SIM card".
I also noticed that carrier specific dialer codes no longer function. For example, if you dial #264# you should be presented with the status of T-Mobiles "Binge On" feature, but now it just does nothing once I hit call.
I have tried swapping the SIM between slot 1 and slot 2, I have also tried rebooting numerous times, all to no avail. I'd really prefer to not have to switch ROMs, but if that ends up being the solution, I guess I'll do it.
Any help would be appricated.
Thanks,
Austin
Click to expand...
Click to collapse
What does your Settings>About Phone>Sim Status show?
There are some apps (root+Xposed required) which edit the number in the sim. You can also input a number if it is blank in the sim.
Failing this, you may have to approach your service provider.

tnsmani said:
What does your Settings>About Phone>Sim Status show?
There are some apps (root+Xposed required) which edit the number in the sim. You can also input a number if it is blank in the sim.
Failing this, you may have to approach your service provider.
Click to expand...
Click to collapse
The Phone Number row shows as Unknown in there as well. However, if I insert my old sim in the other sim slot it then shows my correct phone number.
So the number is there in the sim, but for some reason is only read if I have both sims in.

BIG PROBLEM dual sim

Hi, I have a BIG problem.
Also if I turn off a sim I received call for that sim.
If I turn off one sim it is because I don't want to be reachable.
Please help

ventolino said:
Hi, I have a BIG problem.
Also if I turn off a sim I received call for that sim.
If I turn off one sim it is because I don't want to be reachable.
Please help
Click to expand...
Click to collapse
Basically that's a feature of Samsung devices that u can receive calls from also that device which u have signed in same Samsung account whether it have that sim or not I think u messed up some settings just sign out and in again from your phone and set again permission u want.

Turn 'dual sim always on' to off?

Question Please help! Need some files and help! Modem files - Sim not working!

Hello everybody i have Samsung Galaxy s21 FE 5G "SM-G990B/DS" Snapdragon 888.
I bought the phone second hand knowing it is problematic,
The problem is that when a sim card is inserted the phone asks for the pin code then once the pin is entered it knows if the pin is correct or incorrect, i enter the correct pin but then nothing happens. In the status bar there is that *no sim inserted* symbol. Once i connect to a wifi network and turn wireless calling feature on, calling and sms function of the phone starts working with inserted sim card. Long story short without wifi connection sim doesn't work at all. I hope i've described my problem clearly.
i can provide every bit of information about the phone.
Thanks in advance to anyone who helps.
Edit: I have tried re-flashing a new firmware via odin.

Perhaps the calls work over WiFi, because the SIM provider allows you to make calls over WiFi through the google carrier service.
So, you probably have a faulty RIL as the SIM card was read correctly.

What possible way i can fix it? I can't find many sources about s21 fe since its a relatively new device and not very popular around devs.