Depending on the carrier the cell phone SIM card will expire. As of this writting:
Natcom will expire after 3 months
Digicel will expire after 1 year
You can usually post-pone your expiration date by adding minutes to your SIM number. Many people traveling back and forth between Haiti will do it online. Both Digicel and Natcom have online sites to top up minutes.
Posted in: Telephones and Internet