Android sip voip client recommendation?

I always used Sipnetic as it is the most stable one. Also ZoiPer worked okay.

Neither of them integrate with the normal phone dialer unfortunately. It’s always a mess.

I lately shared here: Calling and texing with JMP VOIP through included Snikket XMPP server - #7 by ph00lt0 what I find the best solution at least for +1 phone numbers.