Pay As You Go (PAYG) is a prepaid mobile model: you load credit onto your SIM, and pay per call, SMS or megabyte of data. No monthly bill, no contract, no commitment.
Pros
- No credit check
- Easy to control spending
- Good for occasional or backup phones
Cons
- Per-unit prices are usually higher than monthly plans
- Credit can expire if unused
- Data is rarely included by default — you buy add-on bundles
PAYG vs SIM-only
A SIM-only monthly plan is almost always better value if you use your phone regularly. PAYG only wins for very light users or as a backup/travel SIM.