Can't connect VPN-IPsec on phones

Hi,

I'm having trouble with this setup with an IPsec setup: I'm trying to replicate what i had with ssl-vpn; multiple local user groups and the possibility to connect via phone.

I could make it work with different users by using a tunnel for each group with a unique ID, the problem is when connecting via phone it doesn't work. I've read some documents that say to use IKEv1, other to use IKEv2, the problem is FortiClient mobile doesn't let me configure auth/enc on IKEv1.

I also tried using eap settings but i get stuck in the login prompt, asking for the password on repeat, so i still couldn't connect with phone with any of the config i tried.

Have anyone encountered this? or do you have any paper with the steps on how to make an IPsec tunnel work for both PC and mobile?

Thanks,