Q: If a person prayed without using their Qibla compass, but estimated the Qibla location, but found out they prayed in the opposite direction, is their salat valid?
A: The proper procedure is to ask someone from the area about the qiblah direction before trying to determine it by yourself. If there was someone present from whom you could ask then the salaah has to be repeated.
And Allah Ta’ala (الله تعالى) knows best.
Mufti Ebrahim Salejee (Isipingo Beach)