Compléter Cell phone networksVersion en ligne Source Key Vocabulary Computing par Clara Asesora 1 up card SIM installed tariffs you top as operators contract users networks go In Britain there are several mobile phone including Vodaphone , O2 , T - mobile and Orange . There are also like Virgin Mobile who use the network of another company . When you buy a cell phone , you have a choice of . The most popular is " pay - - - " , which customers paying for their calls in advance . They can their accounts in shops , over the internet , and at cash maschines . Heave may prefer a . They pay fixed amount every month , but the calls are much cheaper than they are for pay - as - you - go customers . Mobile phones usually come with a already . If you take the phone abroad , you may be able to use it on a local network . This is called " roaming " . It can be expensive , and it may be cheaper to buy a foreign SIM card .
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