1. I have no clue what type of worship service your church practices, especially since it is PCA.
So, it may be acceptable to the Elders and consistent with your local church's ecclesiology.
2. Biblically, however, such behavior is unacceptable and could reveal more about this person than you perhaps would like to know.
3. The answer to your question, if in fact you were really wanting to solicit answers, is a) You are there to worship God... Who has made clear in His written Word how He is to be worshipped, even including the attitude which all the earth is to approach Him in that worship:
Hebrews 12:28-29 (ASV) "Wherefore, receiving a kingdom that cannot be shaken, let us have grace, whereby we may offer service (latreuo worship) well-pleasing to God with reverence and awe: for our God is a consuming fire."
This would even on its face prohibit such acts, e.g., taking photos DURING the actual worship service. IF he was trying to get photos of the congregation, maybe the choir, a guest preacher, the decorations in the sanctuary, or whatever??????, for the church newsletter or whatever??????, he could do that after the service and by having gone to the Elders and asked for permission to do so and made the proper arrangements. I would dare say that texting during worship services in many churches today is not uncommon.