ATT, the only US carrier to offer current Nokia flagship and hotselling Lumia 920 has said that it’s extending the free wireless charging plate offer for Lumia 920 until 21st Feb. They have been giving away those charging plates from the begining. ATT was previously going to to run the the promotion till the end of the January. But we guess it’s the demand for Lumia 920 that has made them extend the offer. After the offer periods is over you’ll need to shell out few extra bucks to buy it. S for those considering Lumia 920 as an upgrade this offer should mean a good deal.