Yes I wrote a guide about that scenario here and indeed I didn't talk too much about 0-conf channels, just briefly mention them.
https://darthcoin.substack.com/p/dunder-lsp-and-lightning-box-provider
and here
https://darthcoin.substack.com/p/bitcoin-private-banks-over-lightning

But I don't know what OP want to do, so not sure if these scenarios are good for him.

DarthCoin

Zero conf channels.. Essentially disposable channels. Actual sats are on your node, so the mobile can spend/receive without having to worry about the phone. If the phone is lost/compromised, you just kill the channel from your node. I know 

 has Blixt guides, but not sure if it goes into private/trusted zero conf channels.

lightning

Can / Should One Run Core Lightning and LND on the Same Node?

kepford

Zero conf channels.. Essentially disposable channels. Actual sats are on your node, so the mobile can spend/receive without having to worry about the phone. If the phone is lost/compromised, you just kill the channel from your node. I know @DarthCoin has Blixt guides, but not sure if it goes into private/trusted zero conf channels.

