Yes, iTel S41 does have the eye protection mode which reduces strain for long reading.
No. iTel S41 does not gorilla glass but it's display is scratch resistant.
No. iTel S41 does not have a hybrid sim slot. It has 1 dedicated slot for MicroSD card and 2 dedicated sim card slots.
iTel S41 dimensions are 144 x 72.4 x 8.3 mm.
Yes, iTel S41 does have VoLTE support.