A low-cost smartphone or a budget smartphone plan—typically inexpensive monthly fees or cheap devices, often offered with low-cost SIM services.
通信費を節約するために格安スマホに乗り換えた。
I switched to a low-cost smartphone plan to save on communication fees.
格安スマホは料金が安い一方で、サポートや通信速度が大手と異なる場合がある。
While budget smartphones are cheap, their support or connection speeds may differ from major carriers.
友人は格安スマホと格安SIMの組み合わせで毎月の支払いを半分にしたと言っていた。
A friend said they halved their monthly payments by combining a low-cost smartphone with a budget SIM.