Three Mobile offers one-day Black Friday deal for free 12-month SIM plan

Three Mobile is offering a one-day Black Friday deal for new customers, allowing them to get a 12-month SIM plan for "free." This promotion is available through TopCashback, which provides a £15 sign-up bonus and up to £120 cashback. Customers can choose between two plans: a 30GB plan for £7 per month, effectively free with £84 cashback, or a 120GB plan for £12 per month, costing £2 per month after £120 cashback. Both plans include unlimited UK minutes and texts. The deal ends at 11:59 PM on November 30. Customers must sign up for TopCashback, select Three Mobile, and complete their purchase to receive the cashback.