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Pick up the receiver. Dial the international call prefix. Dial the country code. Dial the area code. Dial the local number. Press Talk on a mobile phone.
If you're using a traditional fixed phone or landline, pick up the receiver and listen for the dial tone. There must be a dial tone before you can make a call. To make a call from a mobile phone, turn on your phone, go into the telephone application, and bring up the keypad so you can dial the number. Every country has an international call prefix, also called an exit code, that must be dialled before you can call out of the country to another one.   Dial 00. This is the international call prefix for Portugal, and it must be dialled before making calls abroad. If you're calling from a mobile phone, there may be a shortcut for the international call prefix. Look for the + sign, which is the shortcut. Sometimes it’s the same as the 0 button, and sometimes you can use ** as a shortcut. Just like every country has a unique international call prefix to dial out, so too does every country have its own code that you dial when you want to call in.   Dial 1. This is the country code for the US. It’s also the country code for Canada and the Caribbean, because like international call prefixes, country codes can be shared by multiple nations. A country code can be one, two, or three digits long, and some countries have separate codes for mobile phones and landlines. The US, however, is not one of these countries, so the code will always be the same, regardless of what kind of phone you're calling. Bigger countries have area or city codes that divide larger geographical areas into small sections, and countries like the US have hundreds of area codes. Most states have multiple area codes, and you will need to know the particular area code for the state and region you're calling.  Area codes in different countries can be one, two, or three digits long, but in the US they are all three digits. When calling smaller countries, they may not actually have area codes, in which case you would only dial the international call prefix, followed by the country code and local number. This is the specific and direct number of the person or organization you wish to call. This could be a landline on a fixed phone or a mobile number. In the US, local numbers are seven digits long. Once you’ve inputted all the numbers, the number you dial should look something like this: 00 1 123 456 7890. In this example, 00 is the exit number for Portugal, 1 is the country code for the US, 123 is the area code, and 456-7890 is the seven-digit local number. If you're calling from a fixed phone, it will automatically begin to dial when you’ve inputted all the right numbers. However, on a mobile phone, you will have to press Send, Talk, or the telephone icon to actually prompt the phone to dial the number you’ve inputted.