Romanized Bangla: Apnar 2 number theory ta vul. Akta sim modem e lagiye net speed pawa jay 4mbps+ and oi sim tai phone e lagale speed thake avg. 2mbps+. Vebe dekhen sim aktai but speed different. And tower kintu aktai. Robi “Udoy” sim e amon kisu add kora hoyese jeta diye data transfer speedy hoy.