Question: I was a trinitian, until I discussed with JW. I still believe in Trinity cause there're many verses back this up(including Mat 28:19) But I wondered
According to Phil 2:9 and some other verses. Jesus was exalted. If He was/is God, why after resurrection He was not only resurrected but also exalted to higher position (as if he wasn't in that position)?

Edit :
I meant, God the Father exalted Jesus to be on the right hand after His obedience, as if He was an angel (Michael Arcangel) before then now be the first born aka the heir of the authorities and kingdom of His Father.

Edit 2 : oh may, this Jw doctrine almost make me able only understand verses like Jw thinks. That, as if I was blind to the whole context of the chapter and story and bible.

Answer: 
The humbling of the Son of God, and then his exaltation in humanity, is explained in Hebrews 2:9. The literal translation demonstrates the sequence of events :

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> ... but who little some than angels made lower we see Jesus on account of the suffering of the death with glory and with honour crowned
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This is the Englishman's Greek New Testament literal interlinear but can also be seen, very much the same, in the [Biblehub literal interlinear](https://biblehub.com/interlinear/hebrews/2-9.htm).

Being made lower than the angels, that is to say, coming from heaven and having already humbled himself ('voiding' himself as we read in Philippians 2:7) Jesus, in humanity, went further and submitted to suffering and death - in humanity.

For this cause, as the writer to the Hebrews makes clear, that is to say on account of the suffering and death he endured in his humanity, he is, upon resurrection, highly exalted.

The exaltation is in honour of what he, himself, in humanity, endured in his humanity, and is not automatically applied due to his previous glory and honour prior to incarnation.
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> Jesus was exalted [...] (as if he wasn't in that position)
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He wasn't; he descended down to earth (previous two verses), hence the need for an [ascension](http://en.wikipedia.org/wiki/Ascension_of_Jesus), which is what [exaltation](http://www.greekdoc.com/bible/lexicon/uper.html#uperuyow) means; see also John 17:24.

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> I was a Trinitarian
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Apparently a Protestant or Evangelical Trinitarian; when doing the sign of the cross, moving the right hand from the forehead to the chest or abdomen signifies Christ's descent from heaven to earth, and its move to the right shoulder, His ascent to the Father's right hand side (Matthew 26:64, Mark 14:62, Luke 22:69, Acts 7:56, Hebrews 1:3, 8:1; 1 Peter 3:22).

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> If He was/is God, why after [the] resurrection He was [...] also exalted?
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This is a dead giveaway, insofar both seem to befit His humanity; otherwise, in light of divine immortality, one could also ask:

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> If Jesus was God (the famous John1:1), why was He ~~exalted to higher position~~ *resurrected*, as if he wasn't ~~in that position~~ *already alive to begin with*?
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