A SIM card comes with an ID number. It is also called IMSI. It is short for International Mobile Subscriber Identity. To make things simpler, it is your phone number. Aside from SIM cards being your phone number, they can also store contact information and other telephone numbers. SIM cards can also contain SMS messages and allow you to connect to the internet. In general, SIM cards are absolute game-changers. They make the phones work. SIM cards also provide you with a unique identity that is simply you. And that is the international mobile subscriber identity. Simply put, the IMSI is your phone number. Here are a few more details about SIM cards. SIM Cards SIM is short for the Subscriber Identity Module. It is a small card made of plastic that fits into your mobile phone. What It Does SIM cards hold thousands of pieces of information. As I mentioned earlier, it allows you to connect to the internet and the world. All you need is to make sure that the SIM you have on your phone has credits. Once confirmed to have credits, you can connect to the internet and the rest of the world. Because of the SIM card, you can make calls and send SMS. You can also accept calls. You can transfer SIM cards from one phone to another. And with the transfer comes the transfer of information as well. When transferring information, you can choose which ones you retain on your old phone. Another advantage is that when you can no longer use your phone, you can still transfer the SIM card to a newer phone. How to Save Contacts on your Phone This should be easy. Saving your contacts should mean you have enough space on the card. Check out the address book. You can do this by choosing “Menu.” Once done, you choose the option “Contacts.” Next, choose “Options” and then “Settings.” From there, choose “Copy to Phone/SIM” or anything similar to this option. Other phones have a “Move to Phone/SIM” option instead. Some phones have “Save Contacts to SIM” as their option. Doing this would usually take a few minutes. But some phones require you to move contacts one by one. And this is hard, especially if you have a whole lot of contacts to move. Once done, you’re ready to take over the world! — It is always a good thing to remain connected to family and friends while traveling. This is the reason why, when on vacation, a good and reliable SIM card is a must. And this is the same when in the Netherlands, where phones are GSM-compatible. To sum things up, you can also use your phones in the Netherlands. Just make sure your phones are GSM-compatible. Once confirmed, head on to the Netherlands. Enjoy!