Suggestions for improvements are also welcome.Ok so I am in no way responsible of coming up with any of this information on my own, Credit goes to ECS87 and Dex on GSM forum as their write ups and guidance have shed some light and helped me to understand on how to restore Cert files and IMEI on newer samsungs, This is in no way a Tutorial, its just information that i have gathered and want to put in a thread to come back and look over, and add to over time so we can learn to manually write certs and restore IMEI onto our devices rather than depend on box companies that automate this and spend $150-250 just to get access to newer solutions. Please contact if any errors are found and we will attempt to correct them.The pESN and pUIMID values will be incorrect in the rarely used Mac version of Internet Explorer.The pESN and pUIMID values for IMEI codes were not correct in version 1.3.This calculator has been tested for Explorer and FireFox on Windows and Safari, Firefox and Explorer on the Mac.This calculator is provided as is, without warranties of any kind.This calculator incorporates a SHA-1 implementation copyright 2002-2005 by Chris Veness, licensed under LGPL.If the 19th digit is not a check digit add '*' to the end. If the input is 19 digits the last digit is checked to make sure it is a valid check digit and a single 'F' digit is added. If the input is 18 digits a calculated check digit and a single 'F' digit are added. The pUIMID for an ICCID is calculated from a 20 digit string.
The check digit is, however, calculated using the decimal Luhn algorithm for both 14 and 18 digit formats. IMEI codes (14 digit codes with all decimal digits) are treated as hexadecimal numbers when the 18 digit format is calculated.This is most useful for ICCID/LF_EUIMID because it is not always possible for the calculator to determine whether a check digit is included in non-standard ICCID numbers (19 or 20 digits). An asterisk ('*') at the end of a digit string indicates that a check digit should be calculated.For convenience with a test vector any input beginning with two hyphens (-) is treated as a comment and output as a header line.
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