Based upon comments to this question on Christianity SE and, looking at the text of Philippians 2:5-8:
Have this mind among yourselves, which is yours in Christ Jesus, who, though he was in the form of God, did not count equality with God a thing to be grasped, but emptied himself, by taking the form of a servant, being born in the likeness of men. And being found in human form, he humbled himself by becoming obedient to the point of death, even death on a cross.
Does this text indicate a 'time frame' for when Christ Jesus was in the form of God? More specifically, is it exegetically correct to understand Jesus' 'consideration' of equality with God as chronologically preceding his emptying himself by taking the form of a servant?
** Note- from the comments and answers I am concerned that my use of the terms "time frame" and "chronology" are distracting. Given the understanding that God exists outside of time it is difficult to find terms that represent one thing preceding another. The verse seems to indicate that Christ considered, and then emptied himself, and then took the form of a servant by being born, and then humbled himself. Please try not to get hung up on temporal versus eternal terminology (it's not easy).