My Instagram wastes all my credit on my iPhone

Okay so I use to have a Samsung galaxy 2 and I always went on Instagram and my credit never wasted. But on my iPhone it takes my prepaid credit within about 5 days if I'm on it constantly. I don't know if there's a way to fix this or slow it down. But If so please help

You could switch cellular data off for Instagram. Check in the Cellular option.

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