No-contract prepaid plans start at $15 per month, with one unlimited line free for 12 months for eligible internet customers Simple Plans, Straightforward Pricing Sparklight Mobile includes: As part of a limited-time promotional offer, eligible new and existing customers can receive one unlimited mobile line at no cost for 12 months. After the 12-month promotional period, standard unlimited plan pricing applies. A one-time SIM activation fee and taxes may apply. As of March 2, 2026, Sparklight Mobile is ava ...