Dari segi liputan rangkaian, pelan pascabayar itu lebih baik.

Dari segi means in terms of, from the point of view of, or as far as ... is concerned.

In this sentence, Dari segi liputan rangkaian means:

• In terms of network coverage
• As far as network coverage is concerned

It is a very common phrase in Malay for introducing the aspect you are talking about.

Examples:

• Dari segi harga, produk ini murah.
  In terms of price, this product is cheap.
• Dari segi kualiti, dia sangat bagus.
  In terms of quality, it is very good.

Malay often puts the topic or aspect being discussed at the beginning of the sentence.

So the structure is:

• Dari segi liputan rangkaian = topic/aspect
• pelan pascabayar itu lebih baik = comment about that topic

This is similar to English sentences like:

• In terms of network coverage, that postpaid plan is better.

So the fronted phrase helps frame the comparison before giving the main statement.

Literally:

• liputan = coverage
• rangkaian = network

So liputan rangkaian = network coverage.

This is a common collocation in telecom/mobile-service contexts.

Related words:

• liputan internet = internet coverage
• rangkaian mudah alih = mobile network
• liputan 5G = 5G coverage

In Malay, pelan can mean a plan in the sense of a telecom/service package, especially in Malaysian usage.

So:

• pelan prabayar = prepaid plan
• pelan pascabayar = postpaid plan

This is more specific than the general English idea of a plan as an intention. In this context, it means a mobile/phone service plan.

In some contexts, Malay also uses rancangan for plan, but rancangan would not sound natural here for a phone plan.

Pascabayar means postpaid.

It is formed from:

• pasca- = post-, after
• bayar = pay

So it literally suggests paying after use.

Its common opposite is:

• prabayar = prepaid
  
  • pra- = pre-, before
  • bayar = pay

So:

• pelan pascabayar = postpaid plan
• pelan prabayar = prepaid plan

Itu usually means that, but in sentences like this it often works as a demonstrative determiner marking a specific thing already known from context.

So:

• pelan pascabayar = a postpaid plan / postpaid plan
• pelan pascabayar itu = that postpaid plan / the postpaid plan in question

Depending on context, English may translate itu as:

• that
• the
• sometimes nothing explicit, if English does not need it

Malay uses itu after the noun, unlike English, where that comes before the noun.

Compare:

• rumah itu = that house / the house
• orang itu = that person / the person

Malay often leaves out the verb to be when linking a subject to an adjective or description.

So:

• pelan pascabayar itu lebih baik
  literally: that postpaid plan more good naturally: that postpaid plan is better

This is completely normal in Malay.

Other examples:

• Dia tinggi. = He/She is tall.
• Rumah itu besar. = That house is big.
• Makanan ini sedap. = This food is delicious.

So the lack of is is a basic feature of Malay grammar.

Lebih means more, and baik means good.

So:

• lebih baik = better

Malay usually forms the comparative with lebih + adjective:

• lebih murah = cheaper
• lebih besar = bigger
• lebih cepat = faster

So in this sentence, lebih baik means the postpaid plan is better, specifically in the aspect already mentioned.

Malay does not need to state the comparison target if it is already understood from context.

So lebih baik by itself can mean:

• better
• better than the other option(s)

If you want to make the comparison explicit, you can add daripada:

• Dari segi liputan rangkaian, pelan pascabayar itu lebih baik daripada pelan prabayar.
  In terms of network coverage, that postpaid plan is better than the prepaid plan.

So the original sentence is natural if the thing being compared is already obvious.

Yes, in many everyday contexts you could say lebih bagus, and it would sound natural.

Comparison:

• lebih baik = better
• lebih bagus = better / nicer / superior

Baik is often a bit more neutral and standard.
Bagus can sound a little more conversational or evaluative.

So these are both possible:

• Dari segi liputan rangkaian, pelan pascabayar itu lebih baik.
• Dari segi liputan rangkaian, pelan pascabayar itu lebih bagus.

But lebih baik is an especially safe and common choice.

Dari segi is very common and works well in both neutral and fairly formal Malay.

Similar expressions include:

• Dari aspek ... = from the aspect of ...
• Dari sudut ... = from the angle of ...
• Dalam hal ... = in the matter of ...
• Untuk ... = for / when it comes to ... (sometimes, depending on context)

But dari segi is one of the most natural and widely used ways to say in terms of.

The comma separates the introductory topic phrase from the main statement:

• Dari segi liputan rangkaian, = introductory frame
• pelan pascabayar itu lebih baik. = main clause

This is similar to English punctuation in:

• In terms of network coverage, the postpaid plan is better.

In informal writing, people may sometimes omit the comma, but using it is clear and correct.

Yes, but the original order is very natural because it highlights the aspect first.

Original:

• Dari segi liputan rangkaian, pelan pascabayar itu lebih baik.

A possible alternative:

• Pelan pascabayar itu lebih baik dari segi liputan rangkaian.

Both are grammatical. The difference is mainly emphasis:

• starting with Dari segi liputan rangkaian emphasizes the comparison category first
• starting with Pelan pascabayar itu emphasizes the plan first

The original is especially good when comparing several aspects, such as price, speed, and coverage.