Kemudahalihan nombor itu berguna.

Kemudahalihan is an abstract noun meaning portability.

It is built from mudah alih, which means portable, mobile, or literally easy to move/transfer. Malay often uses the circumfix ke- ... -an to turn a quality into a noun:

• mudah alih = portable / mobile
• kemudahalihan = portability

So in this sentence, kemudahalihan nombor is the technical term for number portability.

Because when Malay adds affixes to a compound expression, the result is usually written as one word in standard spelling.

So:

• mudah alih → kemudahalihan

This is normal in Malay, even if the final word looks long to an English speaker.

Nombor means number. In this context, it normally refers to a telephone number.

So kemudahalihan nombor is not about numbers in general, like math. It is the telecom term for being able to keep your phone number when changing service provider.

Yes. In modern Malay, kemudahalihan nombor is a set technical phrase meaning number portability.

That matters because a learner might try to interpret it word by word in a more general way, but native speakers will usually understand it as one established concept, especially in telecom, business, or government contexts.

In Malay, demonstratives such as ini and itu normally come after the noun phrase, not before it.

For example:

• buku itu = that book
• rumah ini = this house

So here the structure is:

• kemudahalihan nombor itu

That is normal Malay word order.

Both are possible, depending on context.

Its basic meaning is that, but in real Malay, itu often also helps mark something as specific, already known, or the one being discussed. Because of that, it can sometimes feel closer to English the than to a strongly pointed that.

So this sentence may be understood as either:

• that number portability is useful, or
• the number portability is useful

depending on the situation.

In this sentence, native speakers will most naturally take itu as referring to the whole noun phrase: kemudahalihan nombor.

That is especially true because kemudahalihan nombor is a fixed technical expression. So the sentence is most naturally read as talking about that/the number portability, not specifically the portability of that number.

Malay often does not use a separate word for is/are in simple sentences like this.

So a structure like:

• Subject + predicate

is enough.

For example:

• Buku itu mahal = The book is expensive
• Dia guru = He/She is a teacher
• Kemudahalihan nombor itu berguna = That number portability is useful

English needs is, but Malay usually does not.

For a learner, the easiest way to treat berguna is as an adjective meaning useful or beneficial.

Historically and morphologically, it contains the prefix ber- plus guna (use), but in ordinary modern Malay, berguna commonly behaves like an adjective-like predicate.

That is why it can come directly after the subject:

• Kemudahalihan nombor itu berguna.

It is natural and grammatically correct, but it sounds somewhat formal or technical because kemudahalihan nombor is a specialized term.

In casual conversation, people might explain the same idea more simply, for example by saying that you can change provider without changing your number. But in official, business, or telecom language, this sentence sounds perfectly normal.