If your Games Hub icon doesn't say "Xbox LIVE" (or if Steps 1–4 don't restore the full Marketplace experience), plug in your Windows Phone using its wall charger, ensure your phone is connected to a cellular data connection or Wi-Fi, and charge your phone for at least 24 hours. During this time, your phone will automatically attempt to connect to the updated online Windows Phone Marketplace infrastructure, after which you should be able to continue using Marketplace.