You just bought a new phone. You already have it in your hands and that delicate moment of inserting the SIM card has arrived . The SIM card, acronym for Subscriber Identity Module or Subscriber Identification Module , is a removable smart card that you can add to a mobile phone or HSDPA or HSUPA modem . It is a small and discreet element, but it contains essential information to identify the customer on the network of each operator. Currently there are different sizes, but the most used are those of 25 x 15 x 0.76 mm and of 15 x 12 x 0.76 mm , called microSIM. They are present in most new-generation terminals: the Nokia Lumia 920 , Nokia Lumia 820 , Nokia Lumia 720 , Nokia Lumia 710 , Samsung Galaxy S3 , Samsung Galaxy S4 , Samsung Galaxy Note 2 or the BlackBerry Z10 . The iPhone 5 , for its part, uses the smallest size that exists and is known by the name of nanoSIM .
And just as the formats have changed, the way in which each of these cards is housed within a terminal has also changed. The monobloc terminals (those where it is not possible to open the rear cover) usually have a slot in one of the side we can insert the card easily. With the more traditional systems , those in which the user can lift the back cover and remove the battery, the SIM card is usually housed in the innermost part of the device, in a more rudimentary way.
But how can I insert the SIM card into the terminal?
First of all, you should know that each smartphone has its peculiarities. In some, opening the lid is relatively easy . They are not particularly fragile pieces, so we can handle each of their elements without fear of breaking. This is the case, for example, of the Nokia Lumia 710 . You have to exert enough force when lifting the lid, but it is easy if we do it properly, using the small slot located on one of the sides and without any fear of breaking the case. It is tough and resistant. After removing the battery, we will find - just at the top - a small slot in which we will be told in which direction to insert the SIM. The golden part usually goes down. To put it in or to take it out, you may have to help yourself with a small clip.
Other smartphones like the Nokia Lumia 720 or the iPhone 5 work differently. In that case, users need to use a special key to insert into a small slot. You will have to wait until you notice a small "click" for the tray to come out. All you have to do is remove it to place the small microSIM a posteriori , also with the golden part facing down and in the direction indicated in the diagram of the tray itself. Once in place, try to make sure it is properly inserted so as not to damage it, and push inward. If you don't have the key on hand or if you lose it after a while, you can use a simple open office clip.