Whenever you want to send an SMS through Internet, it is always a better practice to send them through the website of the mobile service provider, whose connection the recipient is using. When I searched for such pages on the Internet, I found these for Singapore: StarHub: Click Here This is a two-way service, and so the recipient can reply to your message. SingTel: For one-way service, Click Here You will not receive any reply. For two-way service, Click Here You will need to register an account before you can use this service. M1: Click Here This is also a one-way service (not sure though), but M1 customers need to activate Internet SMS before they can receive your messages. To activate, they need to send "Insms on" to "8888".
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