this is the tab for all of the song until it gets to wiz khalifa's part.
[ Tab from: https://www.guitartabs.cc/tabs/m/maroon_5/payphone_btab_ver_2.html ]
|---------------|---------------|--------------------------|---------------|
|---------------|---------------|--------------------------|---------------|
|6-6-6-6-6-6-6-6|---------------|10-10-10-10-10-10-10-10-10|8-8-8-8-8-8-8-8|
|---------------|7-7-7-7-7-7-7-7|--------------------------|---------------|
for the wiz khalifa part you play the same notes but 6 notes a bar a bar
the notes per bar can be halved if you play the song at a quicker tempo.