iTel S41 dimensions are 144 x 72.4 x 8.3 mm.
No. iTel S41 does not gorilla glass but it's display is scratch resistant.
Yes, iTel S41 runs on the latest Android 7.0 and thus having support for the multi windows operations.
Yes, iTel S41 does have the fingerprint sensor.
Yes, iTel S41 does have the LED flash with the front camera.