You can probably just create your own root CA and install it on your mobile device for testing. I've done this for my internal stuff at home and it works well.

You can probably just create your own root CA and install it on your mobile device for testing. I've done this for my internal stuff at home and it works well. I use xca[0] to create/manage the root CA and the certificates, but there are other tools to do this. [0] https://hohnstaedt.de/xca/ https://hohnstaedt.de/xca/