المفروض مندوب التوصيل يتصل بيا قبل ما ييجي.

In Egyptian Arabic, المفروض is a very common way to say supposed to, should, or is expected to.

So المفروض مندوب التوصيل يتصل بيا means something like:

• The delivery person is supposed to call me
• The delivery person should call me

Literally, المفروض comes from the idea of what is assumed / what is required, but in everyday speech it works like a fixed expression.

A useful comparison:

• المفروض ييجي بدري = He’s supposed to come early
• كان المفروض يتصل = He was supposed to call

Because this is an iḍāfa structure, often called a noun-noun possession/association phrase.

مندوب التوصيل literally means something like:

• representative of the delivery
• more naturally: the delivery agent / delivery guy / courier

In an iḍāfa:

• the first noun usually does not take ال
• the whole phrase becomes definite because the second noun is definite

So:

• مندوب التوصيل = the delivery representative/person

This is why مندوب does not have ال here.

مندوب by itself means representative, agent, or delegate.

In different contexts, it can mean different kinds of representatives:

• مندوب مبيعات = sales representative
• مندوب شركة = company representative
• مندوب التوصيل = delivery person / courier

So in this sentence, it does not mean a formal political delegate or anything like that. It just means the person responsible for delivering the order.

Because the verb اتصل in Arabic normally takes the preposition بـ when referring to the person contacted.

So:

• اتصل بفلان = call/contact someone
• اتصل بيا = call me

This is different from English, where call usually takes a direct object:

• call me

But in Arabic, the structure is more like:

• contact with me / get in touch with me

So the بـ is required with اتصل.

بيا means me after the preposition بـ.

So:

• بـ + يا / ي gives بيا
• pronunciation: roughly biyya

In Egyptian Arabic, this is the normal colloquial way to say with me / in me / to me after بـ, depending on the verb or expression.

Here:

• يتصل بيا = he calls me

Even though بيا literally contains the preposition بـ, in natural English you just translate the whole phrase as call me.

This is a very common Egyptian Arabic pattern.

The بـ prefix often marks the ordinary present or habitual form, but after certain expressions and connectors, Egyptian Arabic usually uses the plain imperfect without بـ.

That is why you get:

• المفروض يتصل = he is supposed to call
• قبل ما ييجي = before he comes

This is more natural than using بيتصل and بييجي here.

A rough way to think about it:

• بيتصل = he calls / he is calling in a normal present-sense statement
• يتصل after المفروض = to call / should call / is supposed to call
• ييجي after قبل ما = come in a dependent clause

So the missing بـ is not random; it fits the grammar of the sentence.

قبل ما means before followed by a verb clause.

So:

• قبل ما ييجي = before he comes

Here, ما is not a negative marker. It does not mean not.

Instead, it acts as a linker that helps introduce the following verb clause.

Compare:

• قبل ما آكل = before I eat
• قبل ما تروح = before you go

So in this sentence, ما is just part of the common expression قبل ما.

Because this is Egyptian Arabic, not Modern Standard Arabic.

In Egyptian, the common verb for to come is:

• جه / ييجي

So:

• ييجي = he comes / he will come / he should come, depending on context

In Modern Standard Arabic, you might see verbs like:

• يأتي
• يجيء

But in everyday Egyptian speech, ييجي is much more natural.

You may also see slightly different spellings in informal writing, such as:

• ييجي
• يجي

They represent the same everyday Egyptian verb.

Because Arabic verbs already contain subject information.

ييجي already tells you the subject is:

• he
• singular
• masculine

So Arabic does not need a separate pronoun like هو unless there is a reason to add emphasis or contrast.

In this sentence, the subject is already clear from context:

• مندوب التوصيل is the person being talked about
• so ييجي naturally means before he comes

English requires the pronoun he, but Arabic often does not.

A natural Egyptian pronunciation would be roughly:

el-mafruud manduub et-tawsiil yittisil biyya abl ma yiigi

A few pronunciation notes:

• المفروض → el-mafruud
• التوصيل often sounds like et-tawsiil
• يتصل is often pronounced something like yittisil or yittesel
• بيا sounds like biyya
• قبل is often pronounced abl
• ييجي sounds like yiigi / yeegi

So the whole sentence flows something like:

el-mafruud manduub et-tawsiil yittisil biyya abl ma yiigi