Barzakh is a domain connecting this world to the hereafter where all humans and Jins have to live after death and before Qiyaamat as per their ranking
Barzakh is much larger than this earth, with some experiencing comfort and others facing hardships
Every person has a fixed lifespan on earth that cannot be changed; when their time expires, Hazrat Izra'eel removes their soul
After death, the soul remains connected to the body and feels everything inflicted on the body, experiencing even more than during earthly life
Accursed souls of unbelievers remain in crematoriums, on their graves, in Chaah-e-Barhoot in Yemen, and in different earths up to the seventh earth and even below in a bottomless abyss called 'Sijjieen'
Unbelievers recognize visitors to their crematoriums and graves, seeing, hearing, and knowing what is being said, although their souls are imprisoned
Belief: Soul enters another body after death, known as 'Tanasukh' or 'Awagawan', re-incarnation, is baseless and kufr
Belief: Death is the separation of the soul from the body, not the soul's obliteration; believing in total obliteration makes one a Bud Madhab (misguided and deviant)
Belief: The deceased can speak, and all animals except ordinary humans and Jins can hear him
When the deceased is buried, the grave squeezes him: for a Muslim, gently like a mother'shug, for a kaafir, with such force that ribs protrude from the opposite side
After burial, the deceased hears the footsteps of those leaving, then two Angels, 'Munkir' and 'Nakir', appear with fierce appearances, tearing through the earth towards the deceased