The SIM card, or Subscriber Identity Module, is the nucleus of the cell phone. The SIM holds important information such as the phone number and carrier that provides the card and the rates you pay. Basically, SIM card is a portable memory chip that is inserted in cellular phones. It automatically activates the cell phone when inserted. The card contains a SIM serial number is a unique identification number assigned to each SIM card. It is the 19-digit number found on the back of the card. When switching to a new cell phone, you just have to remove the SIM card from of the old phone and insert it in the new phone. The portability of SIM cards also means that you can insert the card into any compatible phone and your accounts and phone numbers are available as all of the information is stored on the SIM card is from a new phone. There are also International SIM cards.

A SIM card is a programmed microchip that inserts into a compatible Global System for Mobile Communications (GSM) mobile device. The SIM card encrypts transmissions and identifies the user to the mobile network. International SIM cards are used to make cheap cell phone calls in different countries worldwide as well as receive calls in various countries worldwide. International SIM cards can save people a lot of money on phone roaming charges compared to conventional operators. These cards are used by people traveling abroad. When your credit runs low you just have to replenish your account automated and instant top-up service from the carrier 24 hours a day. If you want to avoid excessive and unpredictable roaming charges, international SIM cards are the ideal choice.

An international SIM card features one rate for incoming calls and another for outgoing calls no matter what country you call from or receive a call. International SIM cards have roaming agreements with many local wireless carriers so the cards will work in most countries in the world. The advantage is the rate is known. Some international SIM cards offer rates as low as $1/min. for any outgoing calls and $0.40/min. for incoming calls. It is very beneficial for travelers visiting more than one country.

An international SIM card offers the same phone number so people will know the one number to call you no matter where you are traveling. You will also not have to get a local SIM card for each country or change SIM cards at each country. International SIM offers a reliable and cost effective solution to global roaming charges. The specific rates charge will depend on the carrier as these prices will vary from one carrier to another. Carriers tend to compete for business by offering real great deals

You can get prepaid SIM cards that allow you to use your cell phone when you are traveling abroad without incurring expensive roaming charges. The amount of coverage regarding the number of countries will depend on the carrier. There is no need to change your existing cell phone number when roaming abroad. When traveling abroad, consider getting an international SIM card for your cell phone.

Trying to find the best USA sim card or China sim card? Then check out the leading international sim cards from Brightroam at www.brightroam.com and find out how you can save on your global roaming charges with special international sim card.

Trying to find the best USA sim card or China sim card? Then check out the leading international sim cards at http://www.brightroam.com and find out how you can save on your international roaming charges with special global sim cards.
http://www.brightroam.com

Author Bio: Trying to find the best USA sim card or China sim card? Then check out the leading international sim cards from Brightroam at www.brightroam.com and find out how you can save on your global roaming charges with special international sim card.

Category: Travel
Keywords: Sim cards, Sim card, international cell phone, international SIM card, global phone