Based on the SMS audience etiquette principles, if a customer provides their mobile number during checkout to receive order updates, you have full consent to send them weekly promotional coupons.

False. Providing a mobile number for order updates grants consent only for transactional messages related to that specific purchase. It does not automatically extend to promotional or marketing messages like weekly coupons. SMS marketing requires explicit opt-in for promotional content, meaning customers must clearly agree to receive marketing messages separately from transactional ones. Sending unsolicited promotional messages violates SMS audience etiquette and compliance regulations, potentially leading to penalties and damage to brand reputation.