Could you provide the following information to help us troubleshoot your issue:
1. PhoneGap Desktop version / PhoneGap CLI version
2. PhoneGap Mobile App version
3. Mobile devices & Mobile OS version
4. Computer OS version
5. network type (home/corporate)
6. is your network using a proxy?
7. computer / network security (firewall / anti-virus / disk encryption)
8. are you using VMs on your computer?
9. do you have multiple network adapters (or virtual network adapters)
10. are you using VPN?