Hey still trying to find a good phone that is 100%compactible with Z1 no luck other than I870 which cannot stand.Went 12/04 and tried another I580 AND I880 both had same ploblem.would not make out going calls 100% of time.All incoming and 2 way calls work great.If anyone can offer advise or has had same problem please let me know.

I have a i580 and it works perfect with both of my Z1's.