For RF engineers

Log the handover, not a guess

The operator has lit a new site and you want to know where the phone really switches over — and whether it drops from 5G to LTE anywhere along the road. Switch on the cell scan for both SIMs and GPS at one second, start from the shortcut under the app icon, lock the screen and put the phone on the dashboard. Then drive. What comes out: a timeline with position, the serving cell for each SIM, and a SERVING_CELL_CHANGED event every time the technology, the Cell ID or the PCI changes. Handovers located to the metre, without a scanner that costs as much as a car.