So he (Philip) started out, and on his way he met an Ethiopian eunuch, an important official in charge of all the treasury of the Kandake (which means “queen of the Ethiopians”). This man had gone to Jerusalem to worship, 28 and on his way home was sitting in his chariot reading the Book of Isaiah the prophet. 29 The Spirit told Philip, “Go to that chariot and stay near it.”30 Then Philip ran up to the chariot and heard the man reading Isaiah the prophet. “Do you understand what you are reading?” Philip asked.31 “How can I,” he said, “unless someone explains it to me?” So he invited Philip to come up and sit with him.32 This is the passage of Scripture the eunuch was reading:
“He was led like a sheep to the slaughter,
and as a lamb before its shearer is silent,
so he did not open his mouth.
33 In his humiliation he was deprived of justice.
Who can speak of his descendants?
For his life was taken from the earth.”
34 The eunuch asked Philip, “Tell me, please, who is the prophet talking about, himself or someone else?” 35 Then Philip began with that very passage of Scripture and told him the good news about Jesus.36 As they traveled along the road, they came to some water and the eunuch said, “Look, here is water. What can stand in the way of my being baptized?” 38 And he gave orders to stop the chariot. Then both Philip and the eunuch went down into the water and Philip baptized him. 39 When they came up out of the water, the Spirit of the Lord suddenly took Philip away, and the eunuch did not see him again, but went on his way rejoicing. 40 Philip, however, appeared at Azotus and traveled about, preaching the gospel in all the towns until he reached Caesarea. Acts 8:27-40
And without faith it is impossible to please God, because anyone who comes to him must believe that he exists and that he rewards those who earnestly seek him. Hebrews 11:6
One of the objections to Christianity is, "What about the innocent native in Africa who has never heard about Jesus? Are they going to spend eternity in the torment of hell? That's not fair!" There are a lot of different ways to go at that objection, but in this passage, we have the innocent native in Africa who has never heard of Jesus. Yet he knew there was a God and chose to worship Him. He also realized that he wasn't innocent, because no one is, and he had "pilgrimaged" to Jerusalem to atone for his sins. So the first way to answer this objection is, "There is no innocent native in Africa because 'All have sinned and fallen short of the glory of God' Rom. 3:23"
Second is that we don't go to hell, which by the way a number of solid Evangelical Christians don't believe the Bible teaches Eternal Conscious Torment (ECT), for rejecting Jesus but rejecting God. Romans 1:18 through the end of the chapter makes this abundantly clear. If rejecting Jesus was what got you to hell, everyone born BC would be in hell. Also, please don't send out missionaries because no one is going to hell until we tell them about Jesus and they reject it according to this reasoning. Leave them alone if rejecting Christ sends you to hell. No, it's rejecting God and worshipping the created rather than the creator that earns us eternal separation from Him in Hell. This Eunuch, although a sinner, was a worshipper of God and was not going to hell. But was he going to Heaven? No. At this point he was an Old testament believer who needed to hear about Jesus' atoning sacrifice for his sin. So if he had died without knowing Christ, where would he have gone? I have no idea. All I know is God is good and will do what is right.
So maybe a better question is "How can people get to Heaven who haven't heard about Jesus?" First of all, this question should drive us to use the rest of our life to get the Bible to the masses in all languages (note the Ethiopian had a "Bible"), and second to send missionaries to tell them about Jesus. We have to believe, like Hebrews says, that if someone is diligently seeking God, like the Ethiopian or Cornelius (spoiler alert), God will send a Philip to him. Was Philip a real person? Yes. Did the Ethiopian tell people that a person came and talked to him? I don't know. The fact that Philip showed up in the middle of nowhere supernaturally running as fast as his chariot, knew his language, explained the word, found water to baptize him in the middle of the desert, then disappeared would make the Ethiopian wonder if he had a dream or a vision or an angel visited him. I believe that all those methods are possible means of God reaching those who are diligently seeking Him. Even today, a number of Muslims are coming to the Lord through dreams of Jesus. These outlier methods, however, do not relieve us of the primary plan of God for us believers to tell the good news.
Are you available to be sent? Are you funding missionaries and Bible distribution? Are you even mentioning the name of Jesus to those you rub shoulders with daily? There are a number of religious people all around you who don't know Jesus. Tell them from the Bible. Be a Philip!