Vé điện tử ở trên điện thoại.

Vé điện tử means electronic ticket or e-ticket.

• vé = ticket
• điện tử = electronic / digital

So vé điện tử is the normal way to say e-ticket in Vietnamese.

In Vietnamese, descriptive words often come after the noun they modify.

So:

• vé điện tử = electronic ticket
• literally: ticket electronic

This is normal Vietnamese word order. English usually puts this kind of modifier before the noun, but Vietnamese commonly puts it after.

Ở trên means on or on top of in a location sense.

It is made of:

• ở = at / in / located at
• trên = on / above

Together, ở trên means is on or is located on.

In this sentence, it tells you where the e-ticket is: on the phone.

Because they do slightly different jobs.

• ở marks location: to be located
• trên gives the specific position: on / above

So:

• ở điện thoại would not sound right for on the phone
• trên điện thoại can work in some contexts
• ở trên điện thoại is very clear and natural for is on the phone

You can think of it as roughly is located on the phone.

There is no separate word for is here in the way English has one.

In Vietnamese, location can be expressed with ở, so:

• Vé điện tử ở trên điện thoại.
• literally: E-ticket located on phone.

That naturally means The e-ticket is on the phone.

So ở is doing part of the job that English is does in location sentences.

In this sentence, it normally means on the phone digitally—for example, displayed on the screen, stored in an app, or available on the device.

Even though trên literally means on, Vietnamese often uses trên điện thoại the way English says on my phone:

• Tôi có vé trên điện thoại. = I have the ticket on my phone.

So here it is not usually understood as a paper ticket sitting physically on top of a phone.

Sometimes, but the meaning changes a little.

• trên điện thoại = on the phone, available/displayed/accessible on the device
• trong điện thoại = in the phone, inside the phone/storage/system

For an e-ticket, trên điện thoại is usually the more natural choice if you mean I can show it on my phone.

If you say trong điện thoại, it may sound more like the file is stored inside the device.

In modern everyday Vietnamese, điện thoại often means phone, and in many situations it is understood as a mobile phone / smartphone.

In this sentence, because it talks about an e-ticket, people will usually understand it as a ticket on a mobile phone, especially a smartphone.

If needed, someone could say:

• điện thoại di động = mobile phone
• điện thoại thông minh = smartphone

But just điện thoại is very common and natural.

Vietnamese does not use articles like a, an, and the the way English does.

So Vé điện tử ở trên điện thoại can mean:

• The e-ticket is on the phone
• An e-ticket is on the phone

The exact meaning depends on context.

If the speaker and listener already know which ticket and which phone they mean, English will often translate it with the.

Yes, it is a complete and natural sentence, especially in context.

It sounds like something someone might say when explaining where the ticket is:

• Vé điện tử ở trên điện thoại.
• The e-ticket is on the phone.

In real conversation, speakers might also add more detail, such as:

• Vé điện tử ở trên điện thoại của tôi. = The e-ticket is on my phone.
• Vé điện tử nằm trên điện thoại. = The e-ticket is on the phone.
  (This is possible, but ở trên is more neutral and straightforward.)

A rough pronunciation guide is:

vé điện tử ở trên điện thoại
≈ veh dee-en too uh chern dee-en thoai

A few helpful notes:

• vé has a rising tone
• điện has a falling-glottal kind of tone
• tử has a falling tone
• ở has a broken/rising glottal tone
• trên has a level tone
• thoại has a falling-glottal tone

The exact pronunciation depends on dialect, but the biggest challenge for English speakers is usually the tones and the vowel sounds in words like điện and thoại.

Yes. Electronic ticket, digital ticket, and e-ticket are all possible translations depending on style.

• electronic ticket = very direct translation
• digital ticket = natural in many modern contexts
• e-ticket = often the most idiomatic English choice

So the Vietnamese meaning stays the same, but the best English wording may change depending on context.