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Originally Posted by andyman
I am on NTL and can send and receive sms via my Amstrad emailer phone
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Doesn't the Amstrad use it's own service rather than relying on the telecom company's service? i.e. it doesn't work via Caller ID like the BT system?
I'd assume that when sending it calls some local rate or freephone number to send the message much like a computer would. On receiving, maybe it works like a fax machine, in that it listens for tones and then receives the message.