Bundles of data do not work for big data customers – every GB of data you don’t use costs you money. That why 4G Yacht only offer big data SIM cards as either unlimited or pay as you go plans. Usually the rate per GB for a bundle plan looks good, but unless you’re using the 100% of data bundle, it’s more affordable to pay per GB (pay as you go).
As a simple example, consider a 500GB data plan. The advertised cost of £2 per GB looks good, especially when comparing to a pay as you go rate of £2.50 per GB. The problem is that unless you use the entire 500GB every month, your per GB bundle cost is much higher. With 4G Yacht pay as you go plans your data is valid for 12 months so the rate you see is the rate you’ll actually pay.