I've googled this issue and looked around the forum, and found nothing. If it's a known issue, please direct me accordingly.
Recently installed avast! Mobile on my Samsung Galaxy S2 (GT-I9100G), running Android version 4.0.3 (ICS). Phone is NOT rooted, but planning to do this soon.
When I open avast!, there is a highlighted "Outdated!" button in the top right corner. Clicking this button returns error message:
"Connection to the update server failed. Check your Internet connectivity and try again."
I also tried "Settings" > "Check for updates now", but I get the same error message.
"Data network mode" on the phone is enabled and other apps on the phone can access the Internet with no problem. Within avast!, all connection types are enabled (Wifi, 3G and R).