Strange GPS fix behavior on 3g iPhone -

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i wrote gps enabled iphone app needs 70m accuracy. in cases accuracy reached after few seconds waiting. on occasions never reached. have restart iphone , app , fix acquired immediately.

some users told me starting different app uses gps, close app , starting app again fixes problem well. not sure if works, because couldn't test myself.

the problem occurs on 3g iphones not on 3gs.

any idea happening or how can fix in code, don't have reboot iphone?

edit: code use:

locationmanager = [[cllocationmanager alloc] init]; [locationmanager setdesiredaccuracy:kcllocationaccuracybest]; locationmanager.distancefilter = kcldistancefilternone; locationmanager.delegate = self; [locationmanager startupdatinglocation];

i'm seeing same behavior in own gps-centric app. 3g tends narrow in more 3gs. can figure far 3g's gps got improved 3gs.


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