Camry 1999, have sound from rear bearing of wheel?

when i am driving ,i feel some sound from rear wheel,when i showed to mechanic, he is saying i will have to change the entire hub of wheel ,is it wisable to change the hub instead of simple bearing ,plz i need the correct answer
Camry 1999, have sound from rear bearing of wheel?
Is wisable even a word?
Camry 1999, have sound from rear bearing of wheel?
The bearing can be changed as long as the hub is not ruined.....

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