sm-t311 for "zip file ROM" need.
because "sm-t312 tablet my computer"
"sm-t311 rom" you want to install.
the requirement to make a phone call.
stock rom / offical rom / cm rom - It does not matter to me.
Enough of the SM-t312 installed on my tablet.
If I upload a zip file with cwm recovery.
I think you understand me.
Thank you for your interest.