Dialing takes to long on Samsung Galaxy S7 Edge

I have issue with dialing. When I make call it takes too long, at least 15s and often much more seconds. I have International version SM-G935F and latest official update. All phones which I had including other Samsung galaxy phones works normally, but this one is so, so slow. Every time when I make call I think that is some network problem, but actually any calling takes much time.
Anybody have idea why this S7 edge have this problem?

rebooting takes long

is it suppose to take long after each restart? it stays on the animated cm logo for 2 minutes, on all builds.

HELP wierd SMS that Takes my prepaid balance

Hello i have a samsung s4 I9500 but i recive every 7 or 5 days a strange sms but my prepaid balence go's down when i get it i called my provider they blocked it but i still got them so i got a new sim card
but now i still get them can anyone help me to revome the number of the sms is 10658422
and the sms says
BUB@T|KE MFT@92kt@3h@6810390986556@387@92843934@76572569807 147532@29669@2110884884852