Sim card is very important when using your smartphones. This will serves as your identification number. This is commonly known as mobile number. Mobile numbers starts with first 4 digits known as mobile number prefix, this will helps you to identify what telecom network your contacts are using (e.i; Globe, TM, Cherry Prepaid, or Smart, TNT and Sun.).
"What is SIM card? A subscriber identity module or subscriber identification module (SIM), widely known as a SIM card, is an integrated circuit that is intended to securely store the international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephony devices (such as mobile phones and computers). It is also possible to store contact information on many SIM cards. SIM cards are always used on GSM phones; for CDMA phones, they are only needed for newer LTE-capable handsets. SIM cards can also be used in satellite phones, smart watches, computers, or cameras."(source: Wikipedia)
SIM Cards Formats
- Full-size - This mean the first one when you buy a SIM card, all in one pack. [Millimeters: 85.6 mm x 53.98 mm x 0.76 mm] / (Inch: 3.37 in x 2.125 in x 0.030 in)
- Mini-SIM - When you remove it from the card, and ready to insert it to your phone.[Millimeters: 25 mm x 15 mm x 0.76 mm] / (Inch: 0.98 in x 0.59 in x 0.030 in)
- Micro-SIM - It cut plastic backing plate size to be a bit smaller [Millimeters: 15 mm x 12 mm x 0.76 mm] / (Inch: 0.59 in x 0.47 in x 0.030 in)
- Nano-SIM - Removes all plastic backing pate edge as same memory chip size. [Millimeters: 12.3 mm x 8.8 mm x 0.67 mm] / (Inch: 0.48 in x 0.35 in x 0.026 in)
NOTE: This post will be edited soon for more information regarding with DITO telecom SIM card.