Dear Hadron and MacFett,
Thank you very much for your help.
I will try to clear the cache and data according to your suggestion at home,
as I'm not bringing the device at work.
@MacFett: Yes, by set up email I meant adding account thru "accounts n sync"
Btw I've just found out in google play store's "unsupported android device list" stating that lenovo a366t is not supported.
Is there any workaround?