Written by Muneeb Rana · Last updated 26 October 2026
Quick answer: Good phone mount placement keeps the phone in your peripheral view, low and to one side, without blocking the road, mirrors or airbag zones, and with a view of the sky for GPS. Common spots are low on the windscreen corner, the top of the dashboard or a vent mount. Check local laws, which differ on windscreen mounting.
TL;DR
- Never block the road view.
- Keep clear of airbag deployment zones.
- Low corner of windscreen or dash top.
- Sky view helps GPS.
- Local laws vary.
Phone mount placement principles
Aim for a spot you can glance at as you would a mirror, set up before driving and not touched while moving. NHTSA's distracted-driving guidance stresses keeping eyes on the road and hands on the wheel.
Options compared
| Mount | GPS view | Visibility | Notes |
|---|---|---|---|
| Low windscreen corner | Good | Good | Check legality |
| Dashboard top | Good | Good | Ideal for HUD mode |
| Air vent | Fair | Good | Can overheat with heater |
| Cup holder | Poor | Poor | Requires looking down |
Legal notes
Some places restrict items on the windscreen or allow them only in specific zones. In the UK, the Highway Code warns that devices must not obstruct your view. Look up local rules.
For HUD mode
HUD mode needs the phone lying flat on the dashboard under the glass. Use a non-slip mat. See how to use HUD mode.
Motorbikes and bicycles
Use a handlebar mount designed for vibration; some phone makers warn that high-power motorcycle vibration can affect camera systems. See motorcycle and bike use cases.
Airbags
Never mount a phone where an airbag deploys, such as on the steering wheel hub or above the passenger airbag panel. A phone propelled by an airbag can injure occupants. Your car's manual shows airbag locations.
Vent, dash or windscreen
Vent mounts keep the phone low but can block air flow and cause heat. Dash mounts keep it in view. Windscreen mounts are restricted in some places; check local law.
Checking the mount
Before each trip, tug the mount gently to check it's secure. Suction cups lose grip in heat and cold; clean the cup and glass if it slips.
Before you drive
Open the app, set units and view, start the trip, check the mount is firm, then go.
Related: Speedometer app safety: how to use it without distraction · How to use HUD mode · Phone use while driving laws · How to improve GPS signal · Speedometer for car: your phone as a second display · Motorcycle speedometer app: what riders should know · Stopping distance calculator
Get Speedometer PRO on Google Play · Download on the App Store · Set it up before you move; never handle your phone while driving.
Sources
FAQ
Where is the safest place to mount a phone?
Low and to the side of your line of sight, clear of airbags and not blocking the road view. Check local rules.
Are windscreen mounts legal?
It depends on the jurisdiction. Some allow them in specific zones; others restrict them.
Do vent mounts hurt GPS?
They can reduce sky view slightly but usually work. Hot air from the heater can overheat phones.
Can I hold my phone to check speed?
No. Handling a phone while driving is dangerous and illegal in many places.
What about motorcycles?
Use a dedicated vibration-damped mount and set everything before riding.