Text messages are ubiquitous here in the UK, and normally work fine. For better or worse, many online systems now rely on them for 2FA as well. As another data

Text messages are ubiquitous here in the UK, and normally work fine. For better or worse, many online systems now rely on them for 2FA as well. As another data point, the choice of personal mobile plans in the UK is now almost entirely dominated by how much data allowance you want. Apart from some budget plans for people or devices that don't need significant amounts of data at all, the number of minutes of calling time or SMS messages you send is unlikely to be a significant factor in the plan you choose or the price you pay any more, being practically unlimited in most cases.