Problem Register with SIP TLS

Hi everyone

I use Freepbx based on asterisk i request Let’s Encrypt Certificate and enable SIP TLS on port 5061

I try to configure App on Smartphone i use Gswave but i can’t register, if i use Linphone on my Linux Mint on Laptop it’s register correctly.

I try with an Iphone with IOS 12.5.5 and Adroid 6.0.1

This is an Asterisk forum. The FreePBX and/or Grandstream forums might be better places for your question.

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