No pude descolgar el teléfono porque llevaba dos bolsas y una botella de agua.

Pude is the preterite of poder, and here it presents the failure as a completed event: I couldn’t answer it / I wasn’t able to at that moment.

No podía would sound more like an ongoing state or general inability: I couldn’t / wasn’t able to in a more continuous sense.

In this sentence, Spanish is contrasting:

• no pude = the specific thing that happened
• llevaba = the background situation that was already going on

So the structure is very natural:

• No pude descolgar el teléfono = the main event
• porque llevaba dos bolsas y una botella de agua = the circumstance explaining it

Because llevaba describes the background situation at the time the event happened.

The person was already carrying the bags and bottle when the phone rang or needed answering. That ongoing circumstance is exactly what the imperfect is often used for.

So:

• pude = completed event
• llevaba = ongoing background

This is a very common Spanish pattern:

• Main event in the preterite + background in the imperfect

Literally, descolgar means something like to unhang or to take down from where it is hanging.

Traditionally, a telephone receiver rested on a hook or support, so descolgar el teléfono came to mean pick up the receiver, and from there, answer the phone.

In modern use, especially in Spain, it still naturally means:

• to answer the phone
• to pick up the phone

Even if the phone is modern and nothing is literally hanging, the expression remains.

Yes, but there are differences.

In Spain, all of these are possible:

• descolgar el teléfono = answer/pick up the phone
• coger el teléfono = pick up the phone
• contestar el teléfono = answer the phone

A few notes:

• descolgar sounds very idiomatic and slightly more tied to the physical act of picking up.
• contestar focuses more on the act of answering.
• coger is completely normal in Spain, but learners should know that in many parts of Latin America, coger can have a vulgar meaning, so it is often avoided there.

Since you asked about Spanish from Spain, coger el teléfono is perfectly normal.

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

So:

• descolgar el teléfono = literally pick up the phone
• but naturally understood as pick up my/the phone depending on context

Using mi teléfono is possible, but it is not necessary unless you want to stress that it was specifically my phone.

Here, llevar means to carry.

So llevaba dos bolsas y una botella de agua means:

• I was carrying two bags and a bottle of water

This verb is very common and has several meanings depending on context, including:

• to carry
• to wear
  
  • Lleva una chaqueta. = He/She is wearing a jacket.
• to take/bring
• to have been doing something for a period of time
  
  • Llevo dos años aquí. = I’ve been here for two years.

In your sentence, the meaning is clearly carry.

Because porque is the form used for because when giving a reason.

Here the sentence explains the reason:

• No pude descolgar el teléfono porque llevaba dos bolsas...

Compare:

• porque = because
• por qué = why
  • ¿Por qué no pudiste descolgar el teléfono? = Why couldn’t you answer the phone?

This is a very common confusion for learners, so it is good to notice it early.

Because Spanish usually omits subject pronouns when the verb form already makes the subject clear.

• pude clearly means I could / I was able to
• llevaba also fits naturally with the same understood subject

So yo is not needed.

You could say:

• Yo no pude descolgar el teléfono...

but that would add emphasis, contrast, or clarity, for example:

• Yo no pude, pero ella sí. = I couldn’t, but she could.

Usually, yes, or at least that there was a specific occasion when answering was not possible.

No pude often implies:

• there was a moment when answering could have happened
• but it did not happen because something prevented it

In this sentence, the reason is given immediately:

• porque llevaba dos bolsas y una botella de agua

So it sounds like:

• I couldn’t answer the phone because my hands were full / I was carrying things

It does not necessarily mean a dramatic attempt, but it does point to a specific failed possibility.

Una botella de agua is simply the normal way to say a bottle of water.

Structure:

• una botella = a bottle
• de agua = of water

This noun + de + noun pattern is extremely common in Spanish:

• una taza de café = a cup of coffee
• un vaso de leche = a glass of milk
• una bolsa de plástico = a plastic bag

So this part of the sentence is very straightforward and idiomatic.

Yes. Spanish word order is flexible, though some versions sound more natural than others depending on what you want to emphasize.

For example, you could also say:

• No pude descolgar el teléfono porque llevaba una botella de agua y dos bolsas.
• Porque llevaba dos bolsas y una botella de agua, no pude descolgar el teléfono.

The original version is very natural because it gives:

1. the main fact first
2. the reason second

That is often the clearest and most neutral order.

It is especially common and natural in Spain, yes.

Learners should know that phone-related vocabulary can vary by region. In different Spanish-speaking countries, people may prefer:

• contestar el teléfono
• atender el teléfono
• responder al teléfono
• coger el teléfono (very common in Spain)

So if you are learning Spanish from Spain, descolgar el teléfono is an excellent expression to know.

The opposite verb is colgar.

So:

• descolgar el teléfono = answer/pick up the phone
• colgar el teléfono = hang up the phone

Examples:

• Descolgó, pero nadie habló. = He/She picked up, but nobody spoke.
• Colgué el teléfono después de hablar con ella. = I hung up after speaking with her.

This pair is useful because the meanings are closely linked:

• colgar = hang up
• descolgar = unhang / pick up / answer