JBL Charger 3 x Iphone 6

Hi! I don`t know why, but my Iphone 6 does not connect to my JBL Charge 3! I already searched everywhere and nothing. In the speaker there is a Bluetooth button and when I pressed it, it seemed to be in pairing mode. But nothing appears in my Iphone! Both devices have their Bluetooths on and on pairing mode. The JBL was already connected to my brother`s Iphone, but he deleted it from his devices in Iphone`s Bluetooth options. When he first tried to pair, it when automatically. He didn't`t even pressed the bluetooth button on the JBL... Can you help me? Thanks, Luma