Samsung Serial Number Check Digit

International Mobile Equipment Identity (IMEI) is a number, usually unique, to identify mobile phones, as well as some satellite phones. It is usually found printed inside the battery compartment of the phone, but can also be displayed on-screen on most phones by entering *#06# on the dialpad, or alongside other system information in the settings menu on smartphone operating systems. The IMEI number is used by a GSM network to identify valid devices and therefore can be used for stopping a stolen phone from accessing that network.
Source: Wikipedia

The IMEI (15 decimal digits: 14 digits plus a check digit) includes information on the origin, model, and serial number of the device.
The IMEI is validated in following steps:

Fast Samsung IMEI checker to check carrier, model, blacklist and sim-lock status. The IMEI number of a device is a 15-digit code that is used to identify that.

Starting from the rightmost digit, double the value of every second digit (e.g., 7 becomes 14).
If doubling of a number results in a two digits number i.e greater than 9(e.g., 7 × 2 = 14), then add the digits of the product (e.g., 14: 1 + 4 = 5), to get a single digit number.
Now take the sum of all the digits.
Check if the sum is divisible by 10 i.e.(total modulo 10 is equal to 0) then the IMEI number is valid; else it is not valid.

Example:

Java

// given EMEI number is valid or not.

classIMEI

// Function for finding and returning

staticintsumDig(intn)

inta = 0;

{

n = n / 10;

returna;

{

// for finding length

intlen = s.length();

if(len != 15)

for(inti = len; i >= 1; i--)

intd = (int)(n % 10);

// Doubling every alternate digit

d = 2* d;

// Finding sum of the digits

n = n / 10;

}

// Driver code

publicstaticvoidmain(String args[]) throwsIOException

// 15 digits cannot be stored in 'int' data type

System.out.println('Valid IMEI Code');

System.out.println('Invalid IMEI Code');

}

Python3

# given EMEI number is valid or not

# Function for finding and returning

defsumDig( n ):

whilen >0:

n =int(n /10)

returna

# Returns True if n is valid EMEI

# Sting for finding length

l =len(s)

# If length is not 15 then IMEI is Invalid

returnFalse

d =0

fori inrange(15, 0, -1):

ifi %2==0:

# Doubling every alternate digit

sum=sum+sumDig(d)

return(sum%10==0)

# Driver code

ifisValidEMEI(n):

else:

C#

// given EMEI number is valid or not.

// returning sum of digits

staticintsumDig(intn)

inta = 0;

{

n = n / 10;

}

staticBoolean isValidIMEI(longn)

// String for finding length

intlen = s.Length;

if(len != 15)

for(inti = len; i >= 1; i--)

intd = (int)(n % 10);

// Doubling every alternate

if(i % 2 0)

sum += sumDig(d);

}

return(sum % 10 0);

publicstaticvoidMain()

// 'int' data type

Console.Write('Valid IMEI Code');

Console.Write('Invalid IMEI Code');

}

Output:

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Samsung Serial Number Check Digit Numbers

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