síma

In a sentence

• Ég keypti nýjan síma í dag.

  I bought a new phone today.

  In this sentence, 'síma' is used to mean 'phone', specifically a mobile phone or similar device, as the direct object of the verb.

• Hann svarar aldrei í síma.

  He never answers the phone.

  Here, 'síma' represents the concept of a phone call or the action of answering the phone in general usage.

• Getum við tengt þennan stað við línu til að hringja úr síma?

  Can we connect this place with a line to make a call from a phone?

  In this sentence, 'síma' is used to denote the physical device required to make calls, implying a landline-based phone.