Hi Simon, i couldn't say which is "best" but we do use MySms so i can tell you about that. First thing is its free, well assuming you have unlimited text allowance on your fone . You need to install MySms app on your fone, register free account. Contact them by email for free "API Key", enter it into Aworker and hey presto they get sent. They appear sent from your fone and if they reply the replies go to your fone.