Yes, it's likely best to not hold your BTC on an exchange. Electrum is great and one of the most trusted wallets. However, I don't think Electrum can run on a mobile phone. Here's a good list https://www.lopp.net/bitcoin-information/recommended-wallets.html although Samourai is likely not one you li...

Join us now for a game-changing opportunity! Earn up to $3,000 daily. Don't miss out, act fast! Join here: https://t.me/Walmartinvestmentloans

Seria viável usar um celular antigo para isso.