Mobile country code (MCC)
International dialling prefix:
Long Code - Yes
Short Code - No
Sender ID - 6 Character Alpha. Preregistration is required.
One-way communication - Yes
Two-way communication - Yes (long code needs to be included in message content as the Sender ID will be an Alpha Sender ID).
Subscribers must opt-in to receive messages.
Opt-in is valid for only 6 months and then needs to be opted in again.
Opt out requirements:
STOP keyword must be included for customers to opt-out of receiving messages.
Sender IDs for international numbers will be replaced with XX-NNNNNN (2 letters followed by 6 numbers).
Sender IDs can only be registered for transactional messages, not for promotional messages.
More than 6 messages with the same Sender ID or content sent to the same number within an hour may be blocked.
Users may not be able to receive more than a total of 200 SMS messages per day across all incoming streams.
Messages towards Jammu or Kashmir networks (example, 405/55) will be blocked by the government due to political sensitivity.
Marketing messages sent between 9:00 pm and 9:00 am India time are not allowed and may be blocked. To bypass this, you can register a 6 character Sender ID.
Message format supported:
Unicode - Yes
Concatenated messages - Yes
Delivery receipts (DLR) supported - Yes
Useful regulatory links:
Telecom Regulatory Authority (TRAI) - www.trai.gov.in