One thing to note about the cellphone issue is to make sure your phone model is on the list of approved phones for BMW cars.
2013 X5 35i Premium, Space Gray, Cinnamon Brown Leather, Dark Bamboo wood trim, Conv. Pkg, CWP, Multi-contour seats, Running board, BMW App. Space saver tire.
2010 535i - Deep Sea Blue w/ NBD Leather, Bamboo Anthracite WT, Sport Auto Trans w/ Paddle shifter, Sports Pkg, PP, CWP, Nav, HD Radio, Ipod.
2007 525i - Black Sapphire Metallic, Black Nevada Leather, Premium package, CWP, 6MT.