The 5G era and its flexible platforms could lower the barriers to a wider range of service providers, but to date, disruptive new entrants are relying on time-honored tactics – undercutting more established players on price. Free Mobile’s impact on the French market is well-known, and the past week has seen two newer challengers, Reliance Jio in India and TPG in Australia, announcing their latest cut-priced offers. RJio, which attracted customers away from the other MNOs at a record rate when it launched with a free voice and data promotion, has unveiled a new postpaid tariff which will further undercut competitors. The new deal is priced at INR199 a month with 25GB of data, while all phone calls and texts…