Subscriber identification module (SIM) is a portable memory chip used mostly in cell phones that operate on the Global System for Mobile Communications (GSM) network. These cards hold the personal information of the account holder, including his or her phone number, address book, text messages, and other data. If you want to change your mobile then easily remove the card from one handset and insert it into another.
Types of Mobile Phone Sim Cards:
1- Using H1 Sim Card you Will Get Normal Network On This Sim
2- Using H2 Sim Card You Will Get Better Network On This Sim, Means Strong
3- Using H3 Sim Card You Will Get More Better Network On This Sim, Means Stronger
4- Using H4 Sim Card Normal, Better, More Better Is Nothing In Front OF This Sim.[adsense]
These SIM cards are basically in three different sizes and using mini-SIM or micro-SIM cards. Small sim size is 25 mm by 15 mm, and the micro is 15 mm by 12 mm. Full-sized cards are much larger, 85.6 mm by 53.98 mm and all cards are only 0.76 mm thick. SIM card offers security for both the user’s data and his or her calls. If the mobile phone is stolen, the thief cannot use a locked SIM or get any information off of it without the PIN.