USSD Codes not working.

shiv1gshiv1g Level 2
edited September 30 in ZenFone 6

My phone is not working with the USSD codes ( e.g *111# , *121# ) on both the cellular networks JIO and Vodafone IN. It shows an error of Connection Problem or Invalid MMI code. Last time when i used them about 2 weeks ago they where working perfectly fine.

I tried restarting the phone several times, toggling the airplane mode on and off, etc.


I'm on the latest .73 update.

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