OCCOM sim-only mobile plans are all postpaid, featuring an on going auto-renew that renews on a month-to-month basis. Every month you’ll receive a bill and at the end of that billing cycle your plan inclusions will automatically refresh, making it simple for customers to pick a mobile phone plan that suits both their wallet and usage habits. The bill will have a fixed amount at the end of each month. If you exceed your data limit, calls or SMS allowance, the services will continue, however excess charges will added to your next monthly bill.