A SIM card is an integrated circuit that securely stores the data used to identify a subscriber within a mobile network.

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9
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3answers
6k views

deactivate PIN-request after airplane mode

When switching on the phone, one is by default asked to enter the SIM-PIN -- which is a good security measure, to prevent "strangers" from causing you costs. Now the same applies when returning from ...
1
vote
3answers
33k views

How can I stop my phone sending an SMS every time I insert a SIM card?

I have one Samsung tablet and one Samsung mobile phone. When I insert my Airtel SIM in tablet then it automatically sends one SMS to an unknown number, and when I insert the same SIM card into my ...
12
votes
5answers
188k views

How do I import all contacts from a SIM-card to an Android phone?

My mother have got a HTC Wildfire with Android 2.2. Now I want to import all contacts from her old SIM-card to the phone. I did it and it worked. Then I switched to the new SIM-card, and now when I ...
2
votes
2answers
45k views

Whatsapp, Keeping the number on the new phone but without the old sim card

Whatsapp, Keeping the number on the new phone but without the old sim card. Ok the situation is I love my old number and to be honest don't want to ask everybody to change my number again and again. ...
9
votes
1answer
8k views

Can I use a Motorola Atrix without a SIM card?

My company purchased an Atrix for app development and would like to use it without a SIM card. Unfortunately, on boot it is not possible to get past the "No SIM card. Emergency calls only" screen. ...
7
votes
3answers
31k views

Is it safe to swap SIM cards when the phone is turned on?

On my Galaxy Nexus, I can remove the SIM card without removing the battery. I'm travelling abroad and will find a need to swap SIM cards several times in my phone. I would like to know if it is safe ...
3
votes
1answer
44k views

No SIM card detected after installing new ROM

I probably did some mistake which I don't know how to solve. After I installed a new ROM I get message: Slot 1: No SIM card detected Slot 2: No SIM card detected „SIM management“ is ...
10
votes
2answers
7k views

Good idea to transfer all phone numbers from SIM card to google contacts?

I am new to the whole smartphone thing. Currently all of my telephone contacts are on my SIM card. I suspect it makes sense to move all my phone numbers from the SIM card to my Google contacts (i.e. ...
8
votes
1answer
13k views

I changed my sim card - how do I find which app is sending sms messages to my old number?

I recently traveled to another country and I'm using a local prepaid sim card on my Galaxy S2. My prepaid credit was depleted rather quickly, and when I checked the phone record I found out my phone ...
5
votes
3answers
13k views

Android - “SIM card doesn't allow a connection to this network” ERROR

I have a problem with my Xperia X10 (U20i). I purchased it new. It worked fine for a week or so, then I switched to another network operator. When I try to connect automatically it says "Registered on ...
5
votes
1answer
999 views

SIM Card not detected after encrypting device

I have a Samsung Galaxy Pocket Neo (Model GT-S5310B) running Android 4.1.2 The device is not rooted and the update notifier tells me I have the latest available version installed. Today I tried ...
3
votes
3answers
868 views

How do you copy a contact from the SIM card to the phone in order to assign a picture to it

Searching the site here has let me to believe that you cannot assign a picture to a contact which resides on the SIM card ( I am using a Samsung Galaxy S, and that indeed seems to be the case - at ...
5
votes
1answer
2k views

How secure is a sim lock?

I have sim lock enabled on my sim, so basically, if I put my sim in another phone or if I restart my phone, I need to enter the sim lock pin. How easy is it to crack the sim lock if a theif got hold ...
5
votes
2answers
5k views

HTC Desire S - Number Unknown Is Shown?

My question is similar to this one, however what would be appropriate solution for HTC Desire S device because it does not allow you to change your phone number on SIM card like Samsung Galaxy does? ...
5
votes
1answer
202 views

Do I need network's SIM in in order to receive OTA update

I have a UK HTC Magic which is from Vodafone - I am in France for the time being and don't have the Vodafone SIM in. The phone is on the internet via wifi a lot. Do I need to have Vodafone's sim in ...
4
votes
2answers
5k views

Storage space and memory: mobile phone architecture versus PC architecture

On a PC, there are hard disks acting as storage space where the operating system and application files are stored, and there is RAM which is memory which gets used up by the operating system ...
3
votes
2answers
5k views

How to disable USSD notifications?

On Android 4.2.1, some new stuff has appeared in the notification area. It shows my current balance and has an icon of the "SIM-card menu" app. Also, sometimes, some spammy messages appears (from my ...
1
vote
1answer
11k views

My SIM is not recognized after installing Cyanogenmod; what should I do? [closed]

I've got a Samsung Galaxy S (I9000) which I purchased from the Spanish operator Movistar around two years ago. I have spent most of the day trying to flash it with cyanogenmod 7. TL;DR: Installing ...
0
votes
0answers
81 views

Lenovo A3300-GV TAB Andorid 4.4.2 - No SIM Card - Emergency call only

Using Lenovo A3300-GV TAB Andorid 4.4.2. with Reliance GSM SIM was perfect. Recently I bought new postpaid SIM from Vodafone. Snenario - 1: New vodafone postpaid SIM working fine in others mobile. ...