Ahora no puedo descolgar el teléfono, pero te llamaré más tarde.

Because Spanish often drops subject pronouns when the verb ending already makes the subject clear.

• puedo = I can
• llamaré = I will call

So Ahora no puedo... naturally means I can’t right now... without needing yo.

You could say Yo ahora no puedo..., but that adds emphasis, as if you were contrasting yourself with someone else.

Ahora means now / right now. It shows that the problem is temporary.

So Ahora no puedo descolgar el teléfono means something like:

• I can’t pick up the phone right now
• I’m not able to answer at the moment

It suggests: not now, but maybe later — which fits with pero te llamaré más tarde.

Literally, descolgar means to take down / unhook. Historically, with older telephones, you physically lifted the receiver off the hook.

So descolgar el teléfono literally means to pick up the phone.

In modern Spanish, it still means:

• to answer the phone
• to pick up the phone

Yes, it is a normal expression. In Spain, you may also hear:

• coger el teléfono
• contestar al teléfono
• responder al teléfono

But descolgar el teléfono is perfectly natural.

Spanish often uses the definite article (el, la, los, las) where English would use a possessive like my or your, especially when the ownership is obvious from context.

So descolgar el teléfono sounds natural because everyone understands which phone is meant: the one ringing, or the relevant phone in the situation.

Using mi teléfono is possible, but it would sound more specific or emphatic.

Te is the indirect/direct object pronoun meaning you (informal singular, tú).

• llamar = to call
• te llamaré = I will call you

Spanish usually puts object pronouns before a conjugated verb:

• Te llamo
• Te llamaré
• No te puedo llamar

So te tells us who will receive the call.

Both are correct, but they feel slightly different.

• te llamaré más tarde = I will call you later
• te voy a llamar más tarde = I’m going to call you later

In many everyday situations, both are natural and very similar in meaning.

The simple future (llamaré) often sounds a bit more like a promise, decision, or assurance. In this sentence, that works well: I can’t answer now, but I will call you later.

The accent mark shows the stress:

• llamaré = stress on the last syllable: lla-ma-RÉ

It is the first-person singular future form of llamar:

• llamaré = I will call

Without the accent, llamare would not be standard Spanish spelling.

Many future-tense yo forms have this written accent:

• comeré
• viviré
• saldré
• haré

All of them can mean later, but there are small differences.

• más tarde = later / later on
• luego = later / then
• después = afterwards / later

In this sentence, más tarde sounds very natural because it refers clearly to a later time the same day or after the current moment.

Examples:

• Te llamaré más tarde. = I’ll call you later.
• Luego te llamo. = I’ll call you later / I’ll call you in a bit.
• Después te llamo. = I’ll call you afterwards.

All are possible here, though más tarde is especially straightforward.

Here it means I’m not able to / I can’t.

• No puedo descolgar el teléfono = I can’t answer the phone

It usually suggests a practical reason: you’re busy, in a meeting, driving, with someone, etc.

Spanish poder can sometimes refer to permission too, but in this context it is about ability or circumstances, not permission.

Yes, it is very natural in Spain.

In Spain, you may also commonly hear:

• coger el teléfono
• coger una llamada

However, learners should know that coger can have a vulgar meaning in some parts of Latin America, so outside Spain many speakers prefer:

• contestar el teléfono
• responder el teléfono
• atender el teléfono

Since you are focusing on Spanish from Spain, descolgar el teléfono fits well.

Yes, absolutely. It sounds natural in a message when you want to explain that you cannot answer now but will return the call later.

It is polite and clear.

Depending on tone, you might also hear slightly shorter versions such as:

• Ahora no puedo hablar, pero te llamaré más tarde.
• No puedo coger el teléfono ahora, luego te llamo.

Your original sentence is correct and natural, especially if you want to be a little more explicit about not being able to answer the phone.

Pero means but. It connects two contrasting ideas:

• Ahora no puedo descolgar el teléfono = negative information
• te llamaré más tarde = reassuring follow-up

So the sentence means:

• I can’t answer the phone now, but I’ll call you later.

It softens the first part by immediately giving a solution.

A rough pronunciation guide for an English speaker would be:

ah-OH-rah no PWEH-doh des-kohl-GAR el teh-LEH-foh-noh, PEH-roh teh yah-ma-REH mahs TAR-deh

A few useful points:

• ll in most of Spain is usually pronounced like y in modern standard speech, so llamaré sounds roughly like yah-ma-REH
• j does not appear here, but descolgar has a hard g before a
• r in pero is a light tap
• más has a clear written accent, though in speech the stress is already obvious

The strongest stresses are on:

• a-HO-ra
• PUE-do
• des-col-GAR
• te-le-FO-no
• lla-ma-RÉ
• TAR-de