Mobile phone service in the United Kingdom is straightforward and widely accessible, which makes settling in easier for expats. For expats, there are two main options: pay-as-you-go (PAYG) and monthly contracts. Expats in the UK often start with PAYG SIM cards, which are easy to buy online, in supermarkets, or at phone shops without long-term commitments or credit checks. Monthly contracts usually offer better value for data and calls but often require a UK bank account, address, and sometimes a credit history. Coverage is generally excellent across cities and towns, with strong 4G and expanding 5G networks. Expats in the UK should compare providers based on coverage, international calling options, and data allowances, especially if staying in touch with family abroad. Most phones are unlocked and compatible, so expats can usually keep their existing device. Switching providers is easy, making the UK mobile market flexible and competitive for expats.