What BIP39 mobile wallet (needs to support BTC/ETH/LTC/BCH) would you recommend?
In this case (noob user), ease of use > features. No in-app advertisement or buy/sell option is a plus to avoid confusion/mistake/scam.
Thanks for your insights.
Coinomi should fit your needs, I can personally recommend it. Unfortunately, there are buy/sell/exchange options in the app, but they are well described, so you shouldn't make a mistake.