Synomenon Posted May 9, 2012 Report Share Posted May 9, 2012 Is anyone using an iPhone 4S with the Advanced App. Mode on the P8400BH? I noticed that the P8400BH doesn't include a GPS antenna like the AppRadio does. Do the iOS GPS apps. still work well on the P8400BH even without the addon GPS antenna? Quote Link to post Share on other sites
bigdaddyjosh Posted May 9, 2012 Report Share Posted May 9, 2012 I have the 8400 with the CD-IU201s cable. I just installed it yesterday. Both MotionX GPS and google maps work perfectly. I dont know how well they would work with poor signal though. I believe the iphone uses cell tower triangulation for a gps signal. Quote Link to post Share on other sites
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