Dari segi yuran bulanan, pelan prabayar lebih murah.

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

So:

Dari segi yuran bulanan, pelan prabayar lebih murah.
= In terms of monthly fees, prepaid plans are cheaper.

It introduces the aspect you are talking about. You are not saying prepaid plans are cheaper in every possible way, only with respect to monthly fees.

The comma separates the introductory phrase dari segi yuran bulanan from the main statement.

So the sentence is structured like this:

• Dari segi yuran bulanan = introductory topic/frame
• pelan prabayar lebih murah = main clause

In English, this is similar to:

• In terms of monthly fees, prepaid plans are cheaper.

The comma is helpful and natural in writing, though punctuation can sometimes vary.

Yuran means fee or charge, and bulanan means monthly.

Together, yuran bulanan means monthly fee or monthly charges.

A useful thing to notice is that Malay often puts the main noun first and the describing word after it:

• yuran = fee
• bulanan = monthly

So literally it is something like fee monthly, but in natural English we say monthly fee.

In Malay, modifiers often come after the noun, not before it as in English.

So:

• yuran bulanan = monthly fee
• pelan prabayar = prepaid plan

This is a very common pattern in Malay. English often uses:

• adjective + noun

Malay often uses:

• noun + modifier

So bulanan yuran would sound wrong.

Pelan means plan, and prabayar means prepaid.

So pelan prabayar means prepaid plan.

This is often used for things like mobile phone service. A common opposite is:

• prabayar = prepaid
• pascabayar = postpaid

So if you see pelan pascabayar, that means postpaid plan.

Murah means cheap or inexpensive.
Lebih murah means cheaper.

The word lebih is commonly used to form the comparative:

• murah = cheap
• lebih murah = cheaper
• mahal = expensive
• lebih mahal = more expensive

So the sentence is making a comparison: prepaid plans are cheaper.

Malay often leaves the comparison target unstated if it is clear from context.

So pelan prabayar lebih murah means prepaid plans are cheaper, but it may not explicitly say than postpaid plans. That comparison is understood from the situation.

If you wanted to state it clearly, you could say something like:

Pelan prabayar lebih murah daripada pelan pascabayar.
= Prepaid plans are cheaper than postpaid plans.

Here, daripada means than in a comparison.

Malay often does not need a verb meaning to be in simple sentences like this.

So:

• pelan prabayar lebih murah

literally looks like:

• prepaid plan cheaper

but it naturally means:

• prepaid plans are cheaper

This is normal in Malay. In many cases, you do not need to add a word for is/are.

Malay nouns usually do not have to change form for singular vs plural.

So pelan can mean:

• plan
• plans

The exact number is often understood from context.

If you really want to show plurality, Malay can use reduplication:

• pelan-pelan

But be careful: pelan-pelan usually means slowly, not plans. So in this case, you normally just keep pelan and let context do the work.

That is why pelan prabayar can naturally be translated as prepaid plans here.

You could say it, but the meaning changes.

• murah = cheap / inexpensive
• lebih murah = cheaper

So:

• pelan prabayar murah = prepaid plans are cheap
• pelan prabayar lebih murah = prepaid plans are cheaper

The original sentence is comparative, so lebih is important.

Yes, it is very common in both speech and writing, especially when comparing different aspects of something.

For example:

• Dari segi harga, ... = in terms of price, ...
• Dari segi kualiti, ... = in terms of quality, ...
• Dari segi masa, ... = in terms of time, ...

It is a useful phrase when you want to limit your comment to one specific category.

Yes. A few natural alternatives are:

• Pelan prabayar lebih murah dari segi yuran bulanan.
• Dari segi bayaran bulanan, pelan prabayar lebih murah.

These are very similar in meaning.

A small note:

• yuran often suggests a fee
• bayaran is a more general word for payment/charge

So yuran bulanan and bayaran bulanan can both work, depending on context.

A rough guide for an English speaker:

Dah-ree seh-ghee yoo-rahn boo-lah-nahn, peh-lahn prah-bah-yar luh-bee moo-rah.

A few notes:

• r in Malay is usually trilled or tapped more than in English
• g in segi is a hard g, like in go
• c in Malay is pronounced like ch, but there is no c in this sentence
• stress in Malay is usually not as strong or dramatic as in English

This is only an approximation, but it can help at a beginner stage.