In Belgium BASE, which is owned by KPN, do a reasonable deal compared to the others with BASE 0. Its technically a monthly invoiced plan but works as a pay as you go card - you only get charged for what you use. Its basically the same price as any of the &quot;outside the bundle&quot; costs for their other plans. If you either use phone calls&#x2F;internet&#x2F;text infrequently or highly variable it&#x27;s very interesting.<p><a href="https:&#x2F;&#x2F;www.base.be&#x2F;en&#x2F;mobile&#x2F;monthly-plans&#x2F;base-0.html" rel="nofollow">https:&#x2F;&#x2F;www.base.be&#x2F;en&#x2F;mobile&#x2F;monthly-plans&#x2F;base-0.html</a><p>Interestingly also in Belgium there is legal requirement that the phone company evaluates your bill every X months and notifies you if you could save money by moving to a different plan. Invariably I used to always be recommended BASE 0 due to my highly variable usage.<p>I think the UK had a similar thing from O2 but I don&#x27;t remember if it was a legal requirement. It could be a European thing.