Use ligar to talk about calling or connecting – almost always when talking about modern technology: telephones, computers, networks.
| to call, connect | ligar | ||
| I call | eu lig | o | |
| you/he/she call(s) | você/ele/ela lig | a |
Eu vou ligar para você. (I'm going to call you.)
Você quer ligar à Internet? (Do you want to go online?)
Ligar can also be used to express caring or, connectedness.
Eu não ligo. (I don't care.)