Η περιαγωγή χρειάζεται καλή κάλυψη δικτύου.

Η is the feminine singular definite article, meaning the.

So:

• η περιαγωγή = the roaming

Greek articles change for gender, number, and case, so η tells you that περιαγωγή is feminine singular and is the subject here.

Περιαγωγή means roaming, usually in the mobile-phone sense: using your phone on another network, especially abroad.

In everyday telecom language, it refers to mobile roaming or data roaming.

So Η περιαγωγή is roaming as a concept or service.

Χρειάζεται is the 3rd person singular form of the verb χρειάζομαι, which means to need.

Here the subject is η περιαγωγή (roaming), which is singular, so the verb is also singular:

• Η περιαγωγή χρειάζεται... = Roaming needs... / Roaming requires...

In English, needs and requires are both possible depending on style. Requires sounds a bit more formal.

Καλή κάλυψη means good coverage.

Here is what is happening:

• κάλυψη = coverage
• καλή = good

Because κάλυψη is feminine singular, the adjective must match it:

• feminine singular accusative: καλή
• noun: κάλυψη

This phrase is the direct object of χρειάζεται, so it appears in the accusative.

Because the sentence means good network coverage, not the good network coverage.

Greek often leaves out the article when speaking in a general or indefinite way, just like English:

• χρειάζεται καλή κάλυψη δικτύου = needs good network coverage

If you added an article, it would sound more specific:

• την καλή κάλυψη δικτύου = the good network coverage

That would usually not fit this context.

Δικτύου is the genitive singular form of δίκτυο (network).

Greek often uses the genitive where English uses of:

• κάλυψη δικτύου = coverage of a network / network coverage

So:

• δίκτυο = network
• δικτύου = of network / network's

This is a very common structure in Greek.

Yes, literally it is coverage of network, but in natural English we usually say network coverage.

Greek often expresses these noun combinations with:

• a main noun + a genitive noun

So:

• κάλυψη δικτύου = network coverage
• literally: coverage of network

This is normal and very common in Greek.

The basic order here is:

• Subject + Verb + Object

So:

• Η περιαγωγή = subject
• χρειάζεται = verb
• καλή κάλυψη δικτύου = object

Greek word order is more flexible than English, but this is a very natural and straightforward order.

Yes, Greek allows more flexibility in word order than English because the grammar endings show each word's role.

For example, you might also see:

• Καλή κάλυψη δικτύου χρειάζεται η περιαγωγή.

This still means essentially the same thing, but it puts more emphasis on good network coverage.

The original order is the most neutral and natural for a learner to recognize.

There are two clues:

1. Η περιαγωγή is in the nominative form, which is typically used for the subject.
2. The verb χρειάζεται is 3rd person singular, matching περιαγωγή, which is singular.

Meanwhile, καλή κάλυψη δικτύου is the thing being needed, so it is the object.

It comes from χρειάζομαι, which is one of those Greek verbs that has middle/passive-style endings but an active meaning.

So although χρειάζεται may look passive to a learner, here it simply means:

• he/she/it needs
• in this sentence: it needs

That is normal for this verb.

A rough pronunciation guide is:

ee pe-ree-a-go-GHEE khree-A-ze-te ka-LEE KA-lee-psee thee-KTEE-oo

A few notes:

• Η sounds like ee
• γ before ή in περιαγωγή is a softer sound, not like English hard g
• χ in χρειάζεται is a rough throat sound, somewhat like German ch or Scottish loch
• stress matters in Greek:
  • περιαγωγή
  • χρειάζεται
  • καλή
  • δίκτυο → δικτύου

Yes, it is natural and clear, especially in a technical or telecom context.

It sounds like the kind of sentence you might see in:

• phone settings
• network help pages
• telecom instructions
• travel/mobile service information

So it is a good real-world example of formal, practical Greek.