eth.signTransaction is rejected when Ether balance is zero

[kostysh]

Normally, the calling of web3.eth.signTransaction should result in the signature dialogue.
But if a balance of the account is insufficient to pay a gas fee then the Portis wallet does not allow to sign a transaction and showing a regular wallet window (not confirmation or signature dialogue).
This behaviour is not logical because I do not want to send a transaction but just sign it for later use.
Here is how the Portis signTransaction dialogue look like in case of insufficient funds.

[tomteman]

@kostysh Can you please provide an example of a well-known web3 provider that allows such behavior? (signing txs when a user has insufficient funds).