https://www.almtwerinformatics.com/2020/07/18/%d8%a3%d9%82%d8%b3%d9%85-%d8%a8%d8%a7%d9%84%d9%84%d9%87-%d9%86%d8%aa-%d9%85%d8%ac%d8%a7%d9%86%d9%8a-2g3g4g-%d8%b9%d9%84%d9%89-%d8%a7%d9%84%d8%b4%d8%b1%d9%8a%d8%ad%d8%a9-sim-%d9%86%d8%aa-%d9%85/