You say: "Oh mankind! Indeed I am a Messenger of Lord Allah into all of you, to Whom belongs the kingship of Heavens and Earth, there is no Deity except Him, He gives life and He brings death, so you believe with Allah and His Messenger, the illiterate Prophet who is believing with Allah and His Words, and you follow It so that you may be guided".
Verses 7: 157-158 are the two verses that denote that Muhammad who is the last Messenger and Prophet is illiterate. Lord's Word mentioned in this verse is Adhikr.
It is told in verse 34: 28 that Lord has not sent Messenger Muhammad except for the whole mankind as a Herald and Warner, but most among the mankind do not know it. It is told in verse 21: 107 that Lord has not sent Messenger Muhammad except as Mercy for the entire world. And it is told in verse 25: 1 that blessed is the One Who sent down the Criterion upon His servant so that he has to be a warner for the entire world.
But the Fujjar who are reading these verses in Arabic Quran hide and reject Adhikr which is The Three-Time-Knowledge from the Three-Time-Knower Lord. They have made their food ‘rejecting Adhikr’ as explained in verse 7: 26. For the other people belonging to Messenger's community such as Jains, Buddhists, Hindus, Jews, and Christians if they believed in Lord and the Last Day and do honorable deeds, they have their reward with their Lord, and there shall be no fear upon them and for them will not be grieved as explained in verse 2: 62. See explanation 2: 146; 4: 140; 6: 155-157, and 7: 37-40.