فيه اغنية حلوة على التليفون اللي مع اختي.

Here فيه means there is / there are.

So:

• فيه اغنية حلوة = there is a nice song

This is a very common Egyptian Arabic way to introduce the existence of something. It does not change for singular and plural:

• فيه اغنية = there is a song
• فيه اغاني = there are songs

It is related to في meaning in, but in sentences like this, learners should think of فيه as the everyday Egyptian way to say there is / there are.

Yes — in more standard spelling, it is أغنية.

In casual Egyptian writing, especially in texting or informal notes, people often leave out the initial hamza in words like this. So:

• أغنية = more standard spelling
• اغنية = very common informal spelling

The same thing happens in اختي, which is more formally أختي.

So this is mostly a spelling/register issue, not a meaning issue.

Because اغنية is a feminine noun, and adjectives in Arabic normally agree with the noun they describe.

So:

• اغنية حلوة = a nice song
• كتاب حلو = a nice book

The feminine ending ة on حلوة matches the feminine noun اغنية.

Because in Arabic, adjectives usually come after the noun they describe.

So the normal order is:

• noun + adjective

Examples:

• اغنية حلوة = a nice song
• بنت شاطرة = a smart girl
• فيلم طويل = a long movie

This is different from English, where adjectives usually come before the noun.

In Egyptian Arabic, على is very natural when talking about something being on a device, screen, phone, computer, app, and so on.

So:

• على التليفون = on the phone
• على الموبايل = on the mobile phone
• على الكمبيوتر = on the computer

This is actually similar to English, which also says on the phone or on the computer in many contexts.

If you said في التليفون, that could sometimes be understood, but على التليفون is the more natural phrasing here for stored or available content.

Because the speaker means a specific phone: the phone that is with my sister.

So:

• التليفون اللي مع اختي = the phone that is with my sister

The relative clause اللي مع اختي helps identify which phone is meant, so the definite article ال is natural here.

If you said على تليفون, it would sound more like on a phone / on some phone, which is less specific.

اللي is the Egyptian Arabic relative word meaning that / which / who.

In this sentence:

• التليفون اللي مع اختي = the phone that is with my sister

One very important point for learners: in Egyptian Arabic, اللي is used for all genders and numbers. It does the job that standard Arabic forms like الذي and التي do.

So Egyptian Arabic keeps it simple:

• الراجل اللي... = the man who...
• البنت اللي... = the girl who...
• الحاجات اللي... = the things that...

Literally, مع اختي means with my sister.

So التليفون اللي مع اختي literally means:

• the phone that is with my sister
• in more natural English: the phone my sister has with her

In context, this can feel close to my sister’s phone, but it is not exactly the same structure.

Compare:

• التليفون اللي مع اختي = the phone that is with my sister / the phone my sister has with her
• تليفون أختي or التليفون بتاع أختي = my sister’s phone

So the original sentence focuses on where the phone is or who currently has it, not just ownership.

It describes التليفون, not اغنية.

The structure is:

• فيه = there is
• اغنية حلوة = a nice song
• على التليفون = on the phone
• اللي مع اختي = that is with my sister

So the meaning is:

• There is a nice song on the phone that is with my sister

It does not mean that the song is with your sister. The relative clause is attached to التليفون.

A natural Egyptian pronunciation would be something like:

fīh oghneya ḥelwa ʿala t-telefōn illi maʿ okhti

A few pronunciation notes:

• فيه = fīh
• اغنية = oghneya
• حلوة = ḥelwa or helwa
• التليفون = et-telefōn or after على, often something like ʿala t-telefōn
• اختي = okhti

In fast speech, على التليفون may sound slightly compressed, but the basic pronunciation above is a good model for learners.