I observed a problem with my Lumia 1020. When I am inside my office my cellular signal drops to 2-3 bars of either H/H+ instead of the usual 4G. When this happens I could barely load any websites, or even refresh my Facebook app, or pull messages off of Viber. But for some reason, when I share the connection to one of my officemates on Android he doesn't have any trouble loading pages or using the FB app. Has anybody else experienced this?