Account got banned

Dear GM,
My friend Sswychina(PVP) got banned few days ago, will u please chech the reason, thanks.
As he explained,he got a phone call and AFKed during bgs for a while,doese this trigger the ban? is it a perm ban?
My friend Sswychina(PVP) got banned few days ago, will u please chech the reason, thanks.
As he explained,he got a phone call and AFKed during bgs for a while,doese this trigger the ban? is it a perm ban?