I transfered my BTC to Coinimi and tried the procedure but never received any BCC. In their FAQ's it states: -
----Any BTC sent to Coinomi after block 478558, the block which initiated the fork, are NOT liable for BCH claim.---
I wish had seen this before I attempted it, it's cost me.
RE: Splitting cold wallets and trading BitcoinCash + Coinbase has issued an update