How much drop in signal reception due to the bag?
I notice that my GPS works when in car but when I am on bike if I put the phone in belt pouch or pocket I don't get signal - in the same route.
Was thinking of some GPS antenna like
DealExtreme: $2.99 15CM MCX DVB-T 470~860-Channel Digital TV Antenna
or
DealExtreme: $5.98 GPS External Digital Antenna with MMCX Connector and 3-Meter Cable (1.5Ghz)
The antenna's are not expensive. But then, unless there is proper space to mount the device and the antenna, there's no point buying stuff. So, first gotta make some arrangement like you did