A coupon code for Saily is reportedly available, with some outlets suggesting it offers 35% off on data, while another outlet mentions a 15% discount. Saily's eSIM plans and apps have been reviewed and compared by various technology outlets, with some highlighting their usefulness for international travel and events like the World Cup. The details and benefits of the Saily coupon code and eSIM plans are not entirely clear, with varying information available from different sources.