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Following a tariff overhaul by T-Mobile last month, O2 is the latest network to revamp its monthly contracts. The original home of the iPhone is launching a new SIM-only tariff and updating its ...

Customers with "dongles" from O2 who download an extra 1GB of data beyond the amount included with their contract risk incurring a charge of £200, said moneysupermarket.com, the price comparison ...