budget SIM

Many people may find the communication fees of Japan's three major carriers too high and are considering switching to more cost-effective budget SIM cards (Japanese: 格安SIM). However, with a wide variety of options like ahamo, povo, Rakuten Mobile, and UQ mobile, each offering different data allowances and pricing, it's natural to have questions: "Are budget SIM cards reliable despite being cheap?" "Will I regret switching to a Japanese budget SIM card?"