Signet Mobile Wallet – Bitcoin Stack Exchange

I’m using Testnet with Bitpay’s Bitcoin Core and mobile wallet, and I’m using the testnet wallet to pay out-of-pocket expenses. The current testnet is broken and an alternative is needed. I discovered Signet and I have Bitcoin Core running Testnet and can convert it to Signet. However, you must be able to send and receive Signets using your mobile phone. We know we’ll need internet access, so we’re planning to move to AWS to make it more universally available. The questions I have are: Will existing mobile phone testnet wallets work on SigNet? Can Signet coin coexist with Testnet? Can I receive Signet coins if I create a clean testnet wallet?