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Tech 06 Sep 2026 8 min read

How Your Phone Compass Knows Which Way You Are Facing

A map can show your position correctly while the direction arrow points the wrong way. You turn the phone, but the arrow hesitates, swings around, or seems several degrees off. Then a compass app asks you to move the device through the air to improve its accuracy. These behaviours make more sense once you separate two questions: Where is the phone? and Which way is it facing? Location systems can help answer the first question, but a phone usually needs additional sensors to estimate the second when it is standing still.

Smartphones Sensors

Tech 04 Sep 2026 8 min read

Why Your Phone’s Compass Can Point the Wrong Way

A map app can know your location correctly while the direction arrow points sideways. A compass app can also appear accurate in one place and drift badly in another. These problems make more sense once you separate two questions that phones answer in different ways: Where am I? and Which way am I facing? Satellite navigation can help answer the first question. To estimate the second while you are standing still, a phone commonly relies on magnetic and motion sensors. Those sensors are useful, but the magnetic one can be disturbed by ordinary objects around you.

Smartphones Compass

Tech 03 Sep 2026 8 min read

How GPS Finds Your Phone Without Mobile Data

A phone can often show your location even when mobile data is turned off. That can seem strange if you normally use GPS through a map app that downloads roads, traffic information, and search results from the internet. The key is that finding your position and downloading a map are separate jobs. Satellite navigation can calculate a position without an internet connection, while many of the services built around that position still need network access.

GPS Smartphones