Lycamobile (UK) Mobile Sim Card with GBP &pound;10.00 Prepaid Credit Included Dual-cut, includes standard and micro sized sim cards. A local cell phone number in the UK Include a voucher for 10 GBP of pre-paid credit. Pay As You Go; no yearly contract, monthly charges or credit check You cannot buy topups with a US credit card. Topups can be bought at thousands of locations throughout the UK including in most airports, gas stations & grocery stores.