الجواب حامدا و مصلیا
In the outset, it should be noted that considering the ruling with regard to erasing of messages written on mobile screens as similar to the ruling of erasing that which is written on walls, papers and cloth etc. is not correct. Secondly, when there is permissibility of erasing the holy name of the Almighty written on walls etc due to fear of being ill-mannered, what is wrong in erasing mobile messages which doesn’t carry even this doubt. As such, according to Shari’a, there is nothing wrong in erasing such messages and one should refrain from falling into unnecessary doubts as such.