HAVING more or less invented the smartphone in 2007, Apple has lately lagged behind other gadget-makers. On October 13th it caught up, unveiling its first 5g-enabled iPhones. Expect sales to pick up as users who have put off purchases finally upgrade. Whether they can find a zippy 5g network is another matter. Opensignal, a research firm, finds that most 5g handsets are connected to one less than a quarter of the time.?
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