Reading through posts about the best Bitcoin wallet to use here in this forum, I happened to understand that TrustWallet is not in any way recommended as it is not open source, so now I decided to use my old wallet created using the TrustWallet multiwallet option, which accepts both bitcoin and other altcoins (that apart).
Electrum and blue wallet is a great choice and you already received the answer you are seeking. But its bitcoin-only wallet and since you are looking for an alternative to trust wallet which is multi-crypto wallet available in both IOS and android then the best alternative for that is
Unstoppable Wallet Which is open source multi-crypto available on both Android and IOS.
URL:
https://unstoppable.money/Github:
https://github.com/horizontalsystemsAlso, their supported coins and tokens can be found here:
https://www.cryptowisser.com/wallet/unstoppable-wallet/coins?page=1Note: Unstoppable wallet doesn't provide coin control and sign-a-message features, so it is only suitable for the rest of your altcoins.