This is the most common error and it occurs most often, but no need to worry about it, you just have to reconnect, keep touching the start button untill it connects or displays another error. you may try upto like 50 times, when the network is bad. Time between 6:00pm and 11pm is time that the people are many using this vpn so its hard to connect in that time. but from 12am to 11am it's fast to connect
Download /Upload Limit reached
Droid Vpn gives free 200MBs daily, when you finish them, you either create another account with a different email or pay.
When you create different account using different emails, when it says limit reached, you change account login to another and get more 200mbs. Further, you can activate more 100Mbs per account to make 300MBs by logging to Activate more 100MBs per day per account and clicking activate more 100Mbs.
NB: after switching account, switch on and off aeroplane mode to obtain new ip.
Further if Download limit error persist after you change account, clear app cache. (go to settings>all apss/app management>>droidvpn>>clear cache. Do not clear data. Switch on and off aeroplane mode and connect again.
Engine did not respond to command
This error rarely occus when you start droid vpn or when vpn freezes, Just close it and start it again and connect.
This server is for premium users
.This error occurs when you select a server down that is not written there free, just select any server written there free and connect.
User allready Online
This error happens when you connect and disconnect very fast, the servers still think your already connected and tell you allready online. Wait 30 seconds and connect again.
Downstream inactivity detected
when time passes without any app requesting or sending data online, the vpn link/connection becomes inactive, disconnecting with that error.
Tcp connection failed
The settings given above are for UDP only so make sure you select UDP. TCP and TCP works when there is data plan on your simcard. Just select UDP and connect
Cannot connect to http server
Select UDP and connect again.
You can avoid most errors by uprading $5 a month and connect to all servers.