3.1415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412

My guess is that as much as the iPod can't be used to make calls/text, using it separately for media is a good way to keep from draining your phone for those sometimes critical messages/calls.