So Verizon and At&t just came out with the support for dual sim. I got my XS Max on with both carriers. Verizon for work and AT&T for personal. The messaging is a little tricky. if I don't have you in my current messaging thread it allows you to pick what number you want to message them from. If you are already in my messaging thread then it doesn't allow me to pick which number...it defalts to the personal cell which is the number I picked as primary...any help on this?