Model a1460 serial number dmpjwg60f191 - iPad Apple Tablets & eReaders

Yes u try changing the battery or u may flash up your device and try it to open.

On your iPad's Home screen, click on Settings > General and then check through the list, to make sure that you are typing in the correct number:

Model
Serial
SEID

Have you forgotten your pin code? You may receive some hesitation with helping you unlock a device because a lot of times it could turn out to be a stolen item. Your best bet would be to contact apple support or physically go to an apple store. Good luck!

Serial Number: DN6FXJPYDKPH
Model:- iPad 2 (WiFi)
Codename:- No codename assigned.
Build Country:- We don't know where this unit was built.
Build Year:- This unit was built in the first half of 2011.
Build Week- Week 26 (June)
Production Nr.:- This unit was number 2038 to be built that week.Serial Number: DN6FXJPYDKPH
Model:- iPad 2 (WiFi)
Codename:- No codename assigned.
Build Country:- We don't know where this unit was built.
Build Year:- This unit was built in the first half of 2011.
Build Week- Week 26 (June)
Production Nr.:- This unit was number 2038 to be built that week.

http://www.appleserialnumberinfo.com/Desktop/index.php

Type the words "tablet serial number" and then the number into Google. I bet it gives you the model.

Are you sure it is the serial numbers you are looking at and not the model numbers?

Suggest reading this for best details:
http://www.techhive.com/article/2049920/how-to-tell-which-ipad-model-you-have.html
You do not need the serial number. Check the "A" number and look at above article for your answer.
Good luck!

on the backside of the iPad is a model number:

Model iPad (1st generation) iPad 2 iPad (3rd generation) iPad (4th generation) iPad Air iPad Air 2 Picture Model Number[99] A1219 (Wi-Fi)
A1337 (Wi-Fi + 3G) A1395 (Wi-Fi)
A1396 (GSM model)
A1397 (CDMA model) A1416 (Wi-Fi)
A1403 (Wi-Fi + Cellular (VZ))
A1430 (Wi-Fi + Cellular) A1458 (Wi-Fi)
A1460 (Wi-Fi + Cellular (MM))
A1459 (Wi-Fi + Cellular) A1474 (Wi-Fi)
A1475 (Wi-Fi + Cellular) A1566 (Wi-Fi)
A1567 (Wi-Fi + Cellular How to find iPad IMEI ICCID serial number
http://en.wikipedia.org/wiki/List_of_iOS_devices#iPad

The D025 series is known as the D025 Kindle Fire HD 7" 16GB (Kindle 7)