My brother is considering a windows phone, needs help

[DeathByPlant]

My brother is considering getting the Nokia Lumia icon, he wants to know if there is a way to group chat with other iphone users, and also if there is a way to record in slow mo

 

[Nimdock]

I have a group sms with 4 girls who all have an iPhone and it works fine.

I also have group sms with Android users with no issues.

 

[Ashalinia]

Built in slow motion recording isn't supported. Don't think there's any third party support for that either.