Been using Zoiper IAX SIP VOIP Softphone for a couple months now. It’s basically a VoIP app that lets you make high-quality calls over WiFi, 4G, 5G, you name it. Pretty solid app if you’re into that kind of thing.
Here’s what you do: you can make voice calls, do video calls (with a subscription), transfer calls, put people on hold, all that good stuff. And there’s also Bluetooth support and you can use the speakerphone. And the audio quality is really clear – even on older phones.
Look, if you need a reliable VoIP app for work or just staying in touch with friends, you’ll probably like this. It’s not perfect – the ads can get a little annoying if you don’t pay – but overall it does the job. Worth checking out.