Two locks
A screen lock — PIN, a pattern, a fingerprint, a face. Without it whoever finds the phone gets through to everything.
A SIM PIN — a code on the card in the phone. Whoever steals the phone and swaps the SIM still needs the PIN to the original card (or they swap the card — but data in the phone stay behind the screen lock).
Do not set the phone lock as a date of birth, 1234, 0000. A parent knows why.
A fingerprint or a face is comfortable. Set a PIN as backup anyway — when a finger is wet, a face at night. Auto-lock: 1–2 minutes of inactivity.
Settings
-
Screen lock: Settings → Face ID / Touch ID & Passcode (iPhone) or Security → Screen lock (Android). PIN at least 6 digits or a strong pattern.
-
SIM PIN: Settings → Mobile service → SIM PIN (iPhone) or Security → SIM lock (Android). Change the default PIN from the operator with a parent — it is often on the SIM pack or with the operator.
-
Into the phone audit: Screen lock — yes. SIM PIN — yes / no / a parent deals with it. Auto-lock — [time].
If you forget the PIN, the phone can wipe after X tries — that is why a photo backup. A parent has a backup method with the operator for the SIM.
What to say at home
To a parent:
“I want a screen lock and to know if we have a SIM PIN. I do not say the code to a friend or into chat.”
Into family rules: A phone lock always. PIN not a date of birth. We do not read a code to anyone.
A PIN to a friend “so they can download something for you” = lending keys to the house. No. An account and a phone are not lent.
Now you 💪
Check the screen lock. Auto-lock 1–2 minutes.
With a parent, find out the SIM PIN — on or why not. Write it into the audit.
Check: Screen lock on. SIM PIN checked. Audit updated.
What to take from this lesson
- A screen lock = the first gate. A SIM PIN = a second one on the card.
- Not 1234, not a date of birth.
- Auto-lock short. A photo backup if you forget the PIN.
- A PIN is not read into chat.
© 2026 Ing. Martin Polak / AlgoRhino · 内容使用条款