I have 2 phone on which i use Avast. One is a LG Motion with android 4.0.4, the other is a Samsung admire with android 2.3.6. Neither phone has been rooted. On the Admire I keep having an issue where my email stops syncing. I checked my sync settings and the are all on but shows the day it stopped syncing. I have tried a few things with settings but the only way I can get it to sync again it by removing Avast Anti-theft. Once i remove it the email syncs and i put Anti theft back on. A few days later I notice that it stopped syncing again. I repeat the same steps to get it to work again and I am good for a few days again, I have gone through the process several times now. I have made sure is have the newest versions from Google Play Store. The LG Motion does not have this problem nor did my previous device the LG Esteem.