Quand mon téléphone sonne, je décroche tout de suite si je vois le nom de ma mère.

Yes. In this sentence, quand can be understood as when or whenever, because the whole sentence describes a habitual action, not one single event.

So Quand mon téléphone sonne... means something like:

• When my phone rings...
• Whenever my phone rings...

French often uses the simple present for this kind of repeated situation.

French uses the present tense very often for:

• habits
• general truths
• repeated actions
• conditional patterns that are still seen as generally true

So in:

• mon téléphone sonne
• je décroche
• je vois

the speaker is talking about what they usually do.

In English, we might also use the present:

• When my phone rings, I answer right away if I see my mother’s name.

So the French present works very naturally here.

Sonne is from the verb sonner, which means to ring or to make a ringing sound.

So:

• mon téléphone sonne = my phone is ringing / rings

It is the 3rd person singular form, because mon téléphone is singular.

Related examples:

• Le réveil sonne. = The alarm rings.
• La cloche sonne. = The bell rings.

Literally, décrocher means to unhook or to take down from a hook. Historically, with older telephones, you would physically lift the receiver off the hook to answer.

So in phone-related contexts:

• décrocher = to answer the phone

This is a very common everyday use.

Be careful: outside phone contexts, décrocher can mean other things too, such as:

• to take something down
• to come off
• to obtain something
• to drop out, depending on context

But here it clearly means answer the phone.

Both can relate to answering, but they are not used in exactly the same way.

• décrocher specifically means to answer the phone
• répondre means to answer, more generally

You can say:

• Je décroche. = I answer the phone.
• Je réponds au téléphone. = I answer the phone.

But décrocher sounds especially natural and idiomatic for picking up a call.

Tout de suite means right away, immediately, or straight away.

So:

• je décroche tout de suite = I answer right away

It is a very common expression in French.

A useful point: in everyday French, tout de suite often means immediately, not merely later in a sequence.

Examples:

• J’arrive tout de suite. = I’m coming right away.
• Fais-le tout de suite. = Do it immediately.

Here, si means if.

So:

• si je vois le nom de ma mère = if I see my mother’s name

This is a normal conditional structure in French:

• si + present, then present for general or repeated situations.

So the pattern is:

• Quand X, je fais Y si Z.
• When X happens, I do Y if Z.

Important: this si is not the same as the si used to mean yes in response to a negative question.

Because French usually does not use the future after si when the condition is introduced as if.

French says:

• si je vois = if I see

not:

• si je verrai ❌

This is one of the most important French patterns to remember.

Compare:

• Si je vois son nom, je décroche.
• If I see her name, I answer.

Even if the meaning refers to the future in English, French still commonly uses the present after si in this kind of sentence.

Because voir means to see, while regarder means to look at.

Here the idea is that the speaker notices what appears on the phone screen:

• je vois le nom de ma mère = I see my mother’s name

If you used regarder, it would suggest the act of deliberately looking:

• je regarde l’écran = I look at the screen

So voir is the natural choice when talking about what appears and is visible.

French usually expresses this kind of possession with:

• noun + de + noun/pronoun

So:

• le nom de ma mère = literally the name of my mother

This is the normal French way to say:

• my mother’s name

French does not normally form possession with an apostrophe the way English does.

More examples:

• la voiture de mon père = my father’s car
• le livre de Marie = Marie’s book

Because mère is a feminine noun.

So the correct possessive is:

• ma mère = my mother

French possessive adjectives must agree with the thing possessed, not with the owner.

So:

• mon père = my father
• ma mère = my mother
• mes parents = my parents

Because téléphone is masculine and mère is feminine.

French possessive adjectives change according to the gender and number of the noun:

• mon
  • masculine singular noun
• ma
  • feminine singular noun
• mes
  • plural noun

So:

• mon téléphone
• ma mère
• mes amis

This is a very common agreement pattern in French.

The comma separates the introductory clause from the main clause:

• Quand mon téléphone sonne,
• je décroche tout de suite...

This is similar to English:

• When my phone rings, I answer right away...

The comma helps readability and marks a pause. In informal writing, punctuation can sometimes vary, but here the comma is standard and natural.

Yes. French could also say:

• Je décroche tout de suite quand mon téléphone sonne si je vois le nom de ma mère.

But that version is heavier and less elegant. The original sentence is clearer because it sets up the situation first:

• Quand mon téléphone sonne, ...

This is very natural in both French and English when describing habits.

Yes, nom is perfectly natural here. It means name, and in context it refers to the name displayed on the phone.

So:

• je vois le nom de ma mère means that the speaker sees their mother’s name appear on the screen

French could also use other wording in other contexts, such as:

• si je vois que c’est ma mère
• si son nom s’affiche

But si je vois le nom de ma mère is simple, clear, and idiomatic.

A natural pronunciation would link several words smoothly together. Some important points:

• Quand sounds roughly like kahn
• mon téléphone has the French nasal sound in mon
• sonne sounds like son
• je décroche has the zh sound in je
• tout de suite is often pronounced very smoothly in fast speech
• si je vois may sound almost like one rhythm group
• ma mère has an open vowel in mère

A speaker would likely group it like this:

• Quand mon téléphone sonne | je décroche tout de suite | si je vois le nom de ma mère

French rhythm is based more on groups of words than on stressing individual words strongly, as in English.