What is SIM Critical® Mission Critical – Pay Monthly? SIM Critical® is a special SIM by Radio Commz UK Limited which has been designed for Critical Service providers.  The SIM is a Mission Critical SIM which has 100% uptime and private APN. We also have Pay Annually which has further savings. After checkout you would be sent a link for our Payment Merchant, they will manage the automatic monthly payments to us.

SIM Overuse: Because we will not have an active billing agreement, agreeing upfront to overcharges your SIM(s) will automatically suspend when over usage is detected. A fee is incurred to remove the suspension in the same month. This is calculated on your estimated usage you would require. The suspension will automatically lift on the 1st of each month.

Example Fee: Plan 100Mb – Suspended 15th of Month – Usage 110Mb. Suspension Removal Fee: £4.10

Overuse Tips: Enable Data Saver at all times! Failure to collect payments will result in suspension and the cease of the SIM. UK Authorised Network Access: EE, O2 UK, Vodafone & Three