mysql insert data by way of sub-queries

drop Procedure IF EXISTS Test;          
Create Procedure Test ()                 
the begin
    DECLARE I int; # declare variables
    declare count int; # declare variables
    set i = 0; # variable assignment
        set count = (select count (* ) from app_device); # variable assignments
    while i <count do # loop end condition: out while loop when i is greater than COUNT
        the INSERT app_device_contact` the INTO `(` serial_number`, `tel`) the VALUES (
                (SELECT serial_number from app_device Order by DEVICE_ID limit ASC i,. 1), '. 3');                                                        
        SET I = I +. 1; # cycle time, i plus one
    end while;           
        select * from app_device_contact; # View test data in Table
End
Call test ();