Knocking where there is no signal
Knocking with no signal fails on most field apps because the map and the lead data are fetched as you move. An app built for it stores the map locally before you go out and queues anything you log until the connection returns. What you need to do differently is save the area while you still have bars, usually in the driveway of the last place you did.
What actually breaks
The map first, because tiles are fetched square by square as you pan. Then anything that reads or writes to a server: your door list, logging a knock, creating a new address.
Reps discover this standing in a driveway looking at a white rectangle, which is the single most cited complaint about software in this category.
What should keep working
The map for any area you saved, your position on it, opening the app cold, dropping a new door, and logging a knock. GPS is a radio in the phone and never needed the network at all.
With the network fully stubbed we measured KnockMode drawing 598 roads and 68 building footprints while making zero network requests.
The one thing you must do first
Save the area before you lose signal. No app can download streets it has never seen, so an area you did not save will be blank when you arrive without bars.
Common questions
- Can I knock doors with no cell service?
- Yes, if the app stores the map locally and queues your logs. Most do not, which is why the map goes blank.
- Does GPS work without signal?
- Yes. GPS is a receiver in the phone and does not need a data connection. What needs the connection is the map drawn underneath it.
- What do I need to do before heading out?
- Save the area while you still have bars. Do it in the driveway of the last place you had a connection.
More on working offline
Dead zones, saved maps and field reliability — the wedge, and the thing reps complain about most.