Adding Jio Number — can't add my jio number to mcent

Address: 741501

My jio number is [protected]
But i can't add this with mcent account, every time i entered this number to verify then mcent is displaying me an additional dialogue "enter a valid number"
But why my number is invalid??? Actually im using this number still now
Pls help me to add this number with mcent
Otherwise tell me that how can i change my mcent number to this number