Update (Sep 2 2004): Since this page is getting lots of hits, I have decided to summarize the information from the comments below.
– SMS to reliance mobile phones can be sent from the internet using www.smscountry.com . But it is a paid service.
– SMS can be sent to reliance mobile phones using the format email@example.com .But the email has to be sent as an email message from a mobile phone. The message will not be delivered if it is sent from a normal email account.
– Direct SMS from US mobile phones to reliance mobile phones in India does not work in most cases.
Original Post (Mar 9 2004): For the past few days, I have trying to figure out a way to send SMS to Reliance mobile phones in India. Finally succeeded today.
SMS can be sent to Reliance mobile phones using the service from SmsCountry. It is a paid service. Outgoing SMS is charged 3.2 cents (Rs 1.49) per SMS. Incoming SMS is free. A useful feature is that message notification can also be received at a specified email id. I have set it up such that the email id is that of my cellphone. So, when someone sends an SMS to me through SmsCountry, it goes to the SmsCountry Inbox and also to my cellphone. So, it is like sending an international SMS from India at local SMS rates.
Rediff Mobile (i.e. upgrading your basic rediffmail account) is also good for sending SMS to mobile phones in India. However it does not work for Reliance mobile phones.
Rediff SMS2India does not work for Reliance mobile phones. In fact, it did not work for most mobile phones I tried to send SMS to.
Strange, but I am able to send SMS from my Cingular mobile phone to Reliance mobile phones in Calcutta but not in Delhi.