Unlocked S7, International phone on Sprint network, now GSM with Straight Talk on AT&T towers.

A

AC Question

Samsung Galaxy S7
Unlocked
GSM
WAS International phone on Sprint network
Added AT&T SIM card
Activated on Straight Talk network using AT&T towers

1) Cannot determine how to set-up to provide screen notifications when a voice mail is left. Only way to no of voice mail is to access voice mail

2) When phone screen is swiped to wake up phone, message......'checking device status.....'is ALWAYS present. Cannot determine WHAT this means or how to shut it down

3) REdialing of phone numbers always inserts a '1' in front of the area code but does not allow you to complete the call. Message indicates I am trying to make an International call which is not available.

purchased 2 unlocked phones and phones are great.....just issues mentioned above......

HELP