In my country our cell phone number is usually with 3 header and 7 following digits but now some of the of the country is using 3 digits header with 8 following digits. When I set the cell phone text box with input mask for 7 digit it wont allow the use to enter the 8 digit one. but when i set it for 8 digit it won't accept 7 digit either. how can i set the input mask to accept both 7 digit and 8 digit phone number?