I installed GPS Tag into two iPhone: same iOS 8.1, same hardware (iPhone 5C), same GSM provider...
The first one works not good, sometimes it stops while in background.
The second one doesn't work at all.
It fixes GPS (<10m precision), it connects to server over GSM or Wifi network, but all messages remain as "lost" (I see into statistics windows).
Messages remain in blackbox if I stop the GSM-GPRS-3G and Wifi network.
When I restart GSM-GPRS-3G or Wifi network, messages change from blackbox into "lost".
App sends only text message to server over GSM-GPRS-3G or Wifi network.
I try to reinstall the app, I try to set a password, I try to update to iOS 8.4... app doen't send GPS messages to server, only text messages.
Can you help me? I'm confused!!!