Can you keep your number with Helium Mobile?

Excuse me, could you please clarify for me if it's possible to retain my current phone number when switching over to Helium Mobile? I'm considering making the move, but I'm hesitant to lose my long-standing number that I've had for years. Is there a straightforward process for porting my number over, or are there any specific requirements or fees associated with this service? Your insight on this matter would be greatly appreciated.