Meet the Guide Editor
Sim Card Contributors

The Complete Guide to SIM Cards

nomi sim card chipA Subscriber Identity Module Card, or SIM Card, provides a way to identify the user of a phone on a mobile phone network. Being able to swap SIM Cards between phones allows mobile phone users to make calls on any phone that contains their SIM Card (when the phone has not been locked to a particular mobile service provider). SIM Cards can also be used to store contacts, which can also be transferred between phones.

This guide provides a number of troubleshooting steps that you can take to solve some common issues that relate to SIM Cards, as well as some common mobile phone tips and tricks.

Latest Articles on Sim Card
How to Unlock iPhone 4 Using Gevey Ultra SIM

Still have a locked iPhone 4 and waiting for DEV team to provide an unlock solution? The waiting time is finally over. In this article, I will guide you on how to unlock your iPhone...

Troubleshooting Gevey SIM

In this article, I have highlighted several problems encountered while unlocking an iPhone using Gevey SIM and their recommended solutions. You will also find a step by step guide on...

Removing Your iPhone's SIM Card (iPhone 4)

Removing the SIM card on an iPhone is a surprisingly hard process, but it's far from un-doable. Here's a quick guide on how to remove a SIM card on iPhone 4....

Simple Guide to Copying WinMo Contacts to SIM

Windows Mobile devices save contacts directly to the user's phone, which is fine for typical use; however, power users or anyone changing phones may need to take their contacts...

Most Popular Articles on Sim Card
  •  
    Simple Guide to Copying WinMo Contacts to SIM

    Windows Mobile devices save contacts directly to the user's phone, which is fine for typical use; however, power users or anyone changing phones may need to take their contacts easily from one...

  •  
    Troubleshooting: No SIM Error for iPhone 4

    Have you recently updated your iPhone 4 and the no SIM error iPhone 4 message is driving you crazy? Don’t worry, you can fix the problem easily. In this article I list out a few tested methods...

  •  
    Will My iPhone Work With Other Providers?

    Can the iPhone be used on other wireless networks besides AT&T? Yes, but the answer isn't so simple. We'll explore compatibility with Verizon, T-Mobile, Sprint and Alltel, and show you...

  •  
    Guide to Unlocking Your T-Mobile G1 Smartphone

    Want to unlock your T-Mobile G1 so you can use it on a network outside of T-Mobile? If so, you will need to understand how to unlock your device. This step-by-step guide will show you how to unlock...

  •  
    How to Boost your iPhone Signal - Tips and Tricks

    Steve Jobs, Chairman and CEO, Apple Inc. admits “We screwed up on iPhone signal bars calculation algorithm” & a fix is available in O.S 4.0.1. But, Mr. Jobs forgot that not everyone will...

More About Sim Card
Invalid! Why Your BB SIM Is In Fits

Every once in a while, you'll encounter an issue with your phone that doesn't make sense. One such example is a problem with the validity of the SIM card, even when it hasn't...

How to Unblock Nokia SIM

Unblocking Nokia SIM card requires PUK (personal unblocking key) that only the mobile network operator can provide. PUK should not be entered incorrectly, or else you just destroyed...