Since i joined the crypto world i didnt face any problem regrading wallets but i see that many people lose funds...somtimes the situation is normal like when somone share his private key or back up phrase in a scam website...but lets imagine that somone open a nwe wallet on trust and start using it without even keeping the phrase...is there a way to enter his wallet and make transactions without even having the back up phrase?
Reply to what you're currently saying is "No"I don't see any possibility for someone to get access to your account while the phrase wasn't writing on a sheet or saved on your device. But note that you didn't save the key phrase and this can also lead to loss of funds when you logout or in a situation your device gets stolen. Is very important to keep your key phrase safe.