[mnkmnk]

It is not really a fair comparison. I would expect that an old android phone that is just sitting in the cupboard to be used for hosting. I think the goal should not be “hosting website” but to be able to repurpose an old compute device for something useful. Phones these days are really good computing devices. 8GB or 16GB RAM, fast and efficient ARM processors, flash storage, inbuilt ups, Wi-Fi and 4G/5g connectivity, gpu and hardware accelerated encode and decode for video codecs etc. An equivalent VPS (hardware wise) would be more costly imo.