It probably comes under wear and tear, not covered by warranty, but you could ask.
If you know how to drag and drop files using wifi file sharing and if you lay out another £25 on a desk dock or rapid charger that uses the 3 pin magnetic charge port next to the usb, you will never need the usb again, except for the rare chance you may need to debrick it.
A repair will cost more than a new one these days of £120 playbooks.
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If not BB10 then at least give us Jellybean player.
