قفل البصمة في الهاتف.

Here it is understood as a noun, meaning lock.

Arabic writing usually leaves out short vowels, so قفل can look ambiguous by itself. But in this phrase, the structure shows that it is not a full verb-based sentence. It is a noun phrase, like a label or menu item.

So here, قفل البصمة means something like fingerprint lock or the fingerprint lock.

Because Arabic often expresses X of Y with an iḍāfa construction, also called the construct phrase.

So:

• قفل البصمة = literally lock the-fingerprint = naturally the fingerprint lock / lock of the fingerprint

Arabic does not need a separate word like of here.

This is very common:

• باب البيت = the door of the house / the house door
• كتاب الطالب = the student's book

In an iḍāfa construction, the first noun normally does not take ال.

So Arabic says:

• قفل البصمة

not:

• القفل البصمة

The whole phrase becomes definite because the second noun, البصمة, is definite.

That means:

• قفل البصمة = the fingerprint lock

This is a key rule of iḍāfa:

• first noun: no ال
• definiteness comes from the second noun

بصمة literally means print, impression, or fingerprint, depending on context.

In phone and security contexts, البصمة usually means fingerprint authentication or the fingerprint sensor/feature.

So in this phrase, it does not just mean a random physical print. It refers to the phone’s fingerprint unlocking method.

In tech language, Arabic often uses البصمة by itself when the meaning is obvious from context.

That is just a difference between the two languages.

Arabic commonly uses في meaning in for features, settings, or functions that exist within a device:

• في الهاتف = literally in the phone

But in natural English, we often say:

• on the phone
• on your phone

So the Arabic wording is normal, even if English chooses a different preposition.

Not really. It is better understood as a noun phrase or a label, not a full sentence.

That is very common in menus, settings, app interfaces, and headings.

So:

• قفل البصمة في الهاتف

works well as a label such as Fingerprint lock on the phone or Phone fingerprint lock.

If you wanted a full sentence, you could say something like:

• يوجد قفل البصمة في الهاتف = There is fingerprint lock in the phone
• قفل البصمة موجود في الهاتف = The fingerprint lock is in the phone

A simple pronunciation is:

• qufl al-baṣma fī al-hātif

A few helpful notes:

• ق is a deep q sound, not an English k
• ص is an emphatic s
• هاتف is hātif
• ة at the end of بصمة is usually pronounced like -a when pausing: baṣma

In careful, fully inflected Arabic, the endings could change depending on grammar, but in normal learning and everyday reading without case endings, qufl al-baṣma fī al-hātif is a good practical pronunciation.

Because normal Arabic writing usually omits short vowels.

So the written form:

• قفل البصمة في الهاتف

does not show all pronunciation details.

A fully vowelled version could be something like:

• قُفْلُ البَصْمَةِ في الهاتِفِ

if it is being read as a standalone nominative phrase.

But in ordinary modern writing, those vowel marks are usually left out, and readers understand the intended meaning from context.

الهاتف basically means the phone or the telephone.

In Modern Standard Arabic, it can refer to a phone in general, and context often tells you whether it means:

• a landline
• a mobile phone
• a smartphone

In modern tech contexts, people will often understand الهاتف as the phone/device, especially if the topic is fingerprint lock.

If you want to be more specific, you might say:

• الهاتف المحمول = mobile phone
• الهاتف الذكي = smartphone

It is understandable, especially as a short label or heading, but Arabic can express this idea in several ways depending on what exactly you mean.

For example:

• قفل الهاتف بالبصمة = locking the phone with a fingerprint / fingerprint phone lock
• فتح الهاتف بالبصمة = unlocking the phone with a fingerprint
• ميزة البصمة في الهاتف = the fingerprint feature on the phone

So قفل البصمة في الهاتف works especially well as a compact interface-style phrase, but in full prose Arabic might choose a slightly different wording.