First How to ask a question?
Store the number as a string instead of a number — even if it looks like a number, you want Firebase to treat it as text. Then it will return exactly what you stored, including leading zeros
Phone number sample
when Firebase_Database.GotValue
do
if get tag = “phone” then
set Label1.Text to get value
get value is a string containing "02856921000112" exactly as you stored it, so it will preserve the leading zero.
Also, can you share some example blocks you used to handle Firebase_Database.GotValue when retrieving a number like 02856921000112, so it preserves the leading zeros when displaying the result in a Label?