I used 14 secret codes to unlock menus of settings on my iPhone and Android – how it works

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ZDNET’s key takeaways

• Use these codes to forward calls, pay your bill, check balances, etc.
• Some of the codes work only on certain carriers or devices.
• One of the codes also might erase your data, so use with caution.

I’ve always known that some carriers support phone codes — numbers that start with * or # — so you can check things like your data usage or bill balance. But I recently learned, thanks to ZDNET’s sister site PCMag,…