Mobile Fundamentals · Course 3
Cellular Networks
How a phone finds a tower and keeps a call alive on the move.
- 1Talking to Towers12 min · Cells, towers and handing a call off at 60 mph.
- 2Airplane Mode & Radios10 min · Flip the switches yourself and see which radios go dark.
- 32G to 5G14 min · What actually changed with each generation.
- 4Roaming & Carriers12 min · How your phone works on someone else's network.
Hands-on
Do it on the simulated phone
Every lesson has a lab you can try in your browser, plus questions that earn points toward the Tower Talker badge.
Start lesson 1