أرسلها من هاتفي الآن.

Without vowels, أرسلها is ambiguous in writing. It can be:

• أَرْسِلْها = Send it (imperative, command)
• أُرْسِلُها = I send it (present tense)

In your sentence, since the meaning is shown as a command, it’s read as the imperative: أَرْسِلْها مِنْ هاتِفي الآنَ.

ـها is an attached object pronoun meaning her / it (feminine singular). Arabic often attaches object pronouns directly to the verb:

• أرسل + ها → أرسلها = send it / send her

It’s very common and more natural than using a separate word for it.

ـها can mean her (a female person) or it (a feminine noun). You decide from context and from the grammatical gender of what you’re sending.

Examples:

• رسالة (message) is feminine → you’d say أرسلها = send it (the message)
• A woman → أرسلها could mean send her

If the thing is grammatically masculine (e.g., ملف “file”), you’d usually use ـه:

• أرسله = send it (masculine)

Yes—من literally means from, and here it marks the source/origin: from my phone (i.e., using my phone as the device/source).

In English you might also say on my phone or using my phone, but من هاتفي is a normal MSA way to express that the sending is done from that device/account.

هاتفي = هاتف + ي

• هاتف = phone
• ـي = my (1st person singular possessive suffix)

So هاتفي literally means my phone.

The possessive suffix ـي (“my”) typically fixes the ending, so you normally say هاتفي (pronounced hātifī) regardless of the noun’s case ending in careful speech.

In fully vowelled/classical-style recitation you might see case endings elsewhere (like مِنْ), but with ـي, you generally just get …ī at the end.

The root is ر-س-ل related to sending. The base verb is أَرْسَلَ (past) = he sent / to send.

In your sentence, أَرْسِلْ is the imperative (command) form meaning send!
Then the object pronoun is attached: أَرْسِلْ + ها → أَرْسِلْها.

In Arabic imperatives, the subject “you” is built into the verb form, so it’s not usually written separately.

• أَرْسِلْ already means (you) send! (to a male addressee) If addressing a female, plural, etc., the verb changes (see next question).

Imperatives change depending on who you’re addressing:

• To a man: أَرْسِلْها
• To a woman: أَرْسِلِيها
• To two people: أَرْسِلَاها
• To a group of men/mixed: أَرْسِلُواها
• To a group of women: أَرْسِلْنَها

The rest (من هاتفي الآن) can stay the same.

Yes. Arabic word order is flexible here, and both are natural:

• أرسلها من هاتفي الآن = emphasize from my phone before now
• أرسلها الآن من هاتفي = emphasize now earlier

Both mean the same basic thing; the difference is slight emphasis/focus.

A common careful MSA pronunciation is:

’arsil-hā min hātifī al-’āna

Notes:

• أَرْسِلْها: the hā is long (hā).
• هاتفي ends with a long ī sound (-fī).
• الآن is al-’ān with a clear hamza sound before ān.