You need to have: Restored the Power to the Magnet Train/Radio Station before you can gain the Radio Card. (You need to find the Rocket in Cerulean Gym, find the part, chase the Rocket down and take the part to the Powerstation (East of Cerulean/North of Lavender). The owner of the Radio Station in Lavender (it's where the Pokemon Tower formerly was) will give you the upgrade.
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you have to go to the old ghost tower, east of vermillion city, it is now a radio tower and they will give you a Kanto radio chip for your pokegear.
you fix the power plant then go to the radio station talk to the guy and he gives you it
It is in lavender town :P
You go to lavender town for Kanto and Goldenrod for Johto
you need to go to the Kanto region's radio tower and the director gives you the sound of it or something. then go to the radio selection on your poke-gear and it is near the top.
If you mean the guard by the elavator, you can't get passed him.
you go to the Kanto radio tower in lavender town
fix the problems in the kanto region get the power plant working and then go to lavender town radio station.
First you have to be able to get into Kanto. Then in lavender town, there is a big tower that is the radio tower. Somewhere inside someone gives you the pokeflute for your pokegear radio. You may need a card for it. That's all i remember about that. Hope this helps!
Pokeflute is on the Pokemon radio when you are in Johto or Kanto.
The Kanto radio tower is in Lavender Town.