Yes, you can use 2 different WhatsApp accounts in iTel S41. Not only that, you can use 2 different Facebook, Instagram and Twitter accounts as well.
Yes, iTel S41 is a VoLTE supported phone. You can enjoy Jio video calling easily.
iTel S41 dimensions are 144 x 72.4 x 8.3 mm.
Yes, iTel S41 does have a memory card slot.
Yes, iTel S41 does have the fingerprint sensor.