Apps like T-Mobile Direct Connect

Here are some great alternatives to T-Mobile Direct Connect by Sprint :
Bell Push-to-talk
Bell Push-to-talk
★3.7
Verizon Push to Talk Plus
Verizon Push to Talk Plus
★3.4
Talker PTT Walkie Talkie
Talker PTT Walkie Talkie
★3.2
Zello PTT Walkie Talkie
Zello PTT Walkie Talkie
★4.2
GroupTalk
GroupTalk
★4.0
Synch Push To Talk (PTT)
Synch Push To Talk (PTT)
★3.6
Walkie Talkie: Call & Video
Walkie Talkie: Call & Video
★3.9
PTT walkie talkie - wifi Call
PTT walkie talkie - wifi Call
★3.7
WalkieTalkie:Two Way Radio-PTT
WalkieTalkie:Two Way Radio-PTT
★3.7
Tango Tango
Tango Tango
★3.3
BiPTT - push to talk PTT
BiPTT - push to talk PTT
★4.1
Group Talks: Walkie Talkie Ptt
Group Talks: Walkie Talkie Ptt
★4.4
ProPTT2 Video Push-To-Talk
ProPTT2 Video Push-To-Talk
★3.3
Video Call - Text, Chat, Talk
Video Call - Text, Chat, Talk
★4.4
Mototalk
Mototalk
★3.7
AT&T Enhanced PTT/ FirstNet RR
AT&T Enhanced PTT/ FirstNet RR
★3.6