How do I activate my new SIM card? You will simply dial 555 to activate your new SIM. This is so it will be automatically activated on Digicel's network and you can start using Digicel's services right away. Related articles How and where can I have my SIM card registered? Get help with phones What is Voicemail and how does it work? How to set up Wi-Fi hotspot on your device? Why does someone else have my number?