Most of mobiles are not supporting the arabic fonts properly that why those applications that are using he users mobile fonts for their applications have more chances to change the arabic language styles that why be careful while reading Holy Quran through these apps. huawai phone have more issues with arabic fonts. For example if you open mobile app Islam 360 at huawai mobile then go to surah yasin ayat no 25 and match this ayat with the hard copy of holy Quran. similarly there are lot of mistakes at these phones. so be careful while reading Quran e Pak at these apps.