The 30-day challenge series is back, and this time, I'm rocking Nokia's newest high-end smartphone, AT&T's Nokia Lumia 900!  Coming on April 8th, the Nokia Lumia 900 has the potential to be a huge hit for AT&T and Microsoft.  All things aside, the $99.99 price point will be sure to attract people turned off by the $200-$300 sticker price on other high-end phones.  I'm looking forward to spending the next 30 days with a device that's not a simple rehash of an Android phone - rather, a phone that's part of a carefully orchestrated turnaround effort by a once-powerful manufacturer.  This is make or break time for Nokia, and if they play their cards correctly, the Lumia 900 could be a success.