How long is my top up valid for? SIM airtime is the total number of days you get each time credit is applied to your account. With every top up, your airtime refreshes to 60 days. You can dial *120# to check your airtime status. Related articles How to send credit to someone What prepaid plans are available from Digicel? I want to activate a Postpaid Plan How to request credit How can I check my balance?