How to change permission of my app to read / write?


i just created an application ,the default type of access is readonly, but i need read & write.

so i go to page, and change the value to “Read and Write”

but it just doesn’t allow me to save the setting and tell me to add my cellphone no to profile.

but the awkard thing is when i add my cellphone no (China) and try to activate it . it tells me : “Sorry, we don’t have a connection to your carrier yet!”

i’m crazy…, what’s wrong with your design?