Čekam poziv iz banke.

In Serbian, the subject pronoun is often omitted because the verb ending already shows the person and number.

• čekam = I am waiting / I wait
• the ending -am tells you it is 1st person singular

So Čekam poziv iz banke is perfectly natural. You can add ja only for emphasis or contrast:

• Ja čekam poziv iz banke, a on čeka mejl.
  I am waiting for a call from the bank, and he is waiting for an email.

Poziv literally means call, invitation, or summons, depending on context. In this sentence, it is normally understood as a phone call because of the context.

So:

• poziv = a call
• in everyday use, often a phone call
• but in other contexts it could also mean an invitation or a formal summons

If you want to be extra explicit, Serbian can also say:

• telefonski poziv = phone call

But in normal speech, poziv alone is often enough.

Yes, čekati normally takes the accusative, and that is exactly what you see here.

The noun poziv is a masculine inanimate noun. For masculine inanimate nouns, the accusative singular is the same as the nominative singular.

So:

• nominative: poziv
• accusative: poziv

That is why the form does not change.

Compare with a masculine animate noun, where accusative does change:

• Čekam čoveka. = I’m waiting for the man.

But:

• Čekam poziv. = I’m waiting for a call.

Because the preposition iz requires the genitive case.

The basic form is:

• banka = bank

After iz (from / out of), it becomes:

• iz banke = from the bank

So the pattern is:

• iz škole = from school
• iz kuće = from the house
• iz banke = from the bank

This is one of the key things to learn in Serbian: prepositions often determine the case of the noun that follows.

Here iz means from, and it usually suggests out of, from inside, or from an institution/place of origin.

So:

• poziv iz banke = a call from the bank

In many contexts, iz and od can both translate as from, but they are not always interchangeable.

A helpful rough distinction:

• iz = from inside, from out of, from a place/institution
• od = from a person, source, or possession

Examples:

• iz banke = from the bank
• iz Beograda = from Belgrade
• od direktora = from the director
• od prijatelja = from a friend

So in this sentence, iz banke sounds very natural because the call is coming from the institution.

It is grammatically present tense, but in English the most natural translation is often the present continuous:

• Čekam poziv iz banke.
  = I’m waiting for a call from the bank.

Serbian present tense can cover both:

• I wait
• I am waiting

The exact English translation depends on context. In this sentence, I’m waiting is usually the best choice.

Serbian has no articles, so there is no direct equivalent of a/an or the.

That means:

• poziv can mean a call or the call
• banka / banke can mean bank / the bank, depending on context

So Čekam poziv iz banke could be understood as:

• I’m waiting for a call from the bank
• or, in some contexts, I’m waiting for the call from the bank

Usually the situation makes it clear.

Yes. Serbian word order is more flexible than English word order because cases show grammatical relationships.

The neutral order here is:

• Čekam poziv iz banke.

But other orders are possible for emphasis, for example:

• Poziv iz banke čekam.
• Iz banke čekam poziv.

These alternatives are more marked and depend on what you want to emphasize. For a learner, the original order is the safest and most natural.

A simple learner-friendly pronunciation guide is:

• Čekam ≈ CHEH-kam
• poziv ≈ POH-zeev
• iz ≈ eez
• banke ≈ BAHN-keh

A few useful notes:

• č is like ch in chocolate, but a bit firmer
• ž (not in this sentence, but common) sounds like the s in measure
• Serbian vowels are usually clear and short: a, e, i, o, u

So the whole sentence is approximately:

• CHEH-kam POH-zeev eez BAHN-keh

Yes, depending on context, that is a very natural interpretation.

The verb čekati literally means to wait, but in many everyday situations English may prefer:

• I’m waiting for a call from the bank
• I’m expecting a call from the bank

If you are on standby because you know they will probably call, English often uses expecting, even though Serbian still says čekam.

The dictionary form is čekati = to wait.

It is imperfective, which makes sense because waiting is usually seen as an ongoing process.

So:

• čekati = imperfective verb
• čekam = I wait / I am waiting

In this sentence, the imperfective aspect fits naturally because the action is ongoing: the speaker is in the state of waiting for the call.