I have lost all saved dates on my Samsung s4 galaxy mobile. How do I get them back?

Samsung Galaxy S4: How to open back battery cover:

1) Flip the phone over so you see the back cover..
2) Locate the notch on the side of the phone with your fingernail and pull the cover easily up to unlatch that area and all areas around the phone.. With one hard pull you can easily take off the whole cover.. don't be shy, your Samsung phone is sturdy enough to handle it.

All the blue arrows in the below image shows where the cover clicks into the inside of the phone to keep it closed.
3.) when you need to put the cover back on the phone.. place the cover over the back part of the phone, noting that the camera hole in the cover goes at the top..

Then grip your left hand on the left side of the phone and your right hand on the right side of the phone.. apply pressure to each side to click the latches to the phone locking it in place.

Afterwards, run your fingers along the back sides of the phone to see if there are any bulges (a latch may not have clicked in place). Either apply pressure there to click it into place or you may have to take the cover off again and try again.

It's very simple and easy once you get the hang of it.

How to Open Samsung Galaxy S4 Back Cover Insert Battery SIM Replace Back...

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Bending the back cover will not damage it because it is plastic.. unless you bend it to crease it. Below is Samsung's durability test.
https://www.youtube.com/watch?v=UrhCz6PnT78
(you may need to copy and paste this link to make it work)
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How do I take screenshots on my Samsung Galaxy Avant ™ ?

www.samsung.com > ... > Cell Phones > T-Mobile

Samsung Electronics... of the screen. The screenshot will be copied to the clipboard and saved to the Screenshots folder in the Gallery. ... Print: Print the screenshot to an available printer via a wireless network, Wi-Fi Direct, or USB cable. Settings: ... Cell Phones.

How to take a screenshot on Samsung Galaxy - PC Advisor

www.pcadvisor.co.uk > ... > How to take a screenshot on Samsung Galaxy

May 15, 2015 - Taking a screenshot on a Samsung Galaxy smartphone is a simple task, but it's a ... Whether you've got a Samsung Galaxy S3, Samsung Galaxy S4 orSamsung ... How to take a screenshot on Samsung Galaxy. PC Advisor · Phones ....Once my Galaxy S3 get fully charged on wireless charging pad , I will ...

How to take a screenshot on Android phones, tablets - PC ...

www.pcadvisor.co.uk/.../how-take-screenshot-on-android-phones-tablets...

Aug 20, 2015 - In the early days of Android taking a screenshot on a phone or tablet ... on an Android smartphone or tablet, including the Samsung Galaxy S6, ...

Hi. You can unlock your T-mobile network locked Samsung Galaxy S4 safer and easier using unlock code. You can get the accurate unlock code for your Samsung Galaxy S4 from Unlock-Zone.Com at affordable cost.
-<()>--<()>--<()>--<()>--<()>--<()>--<()>--<()>--<()>--<()>-
UNLOCKING INSTRUCTIONS
-<()>--<()>--<()>--<()>--<()>--<()>--<()>--<()>--<()>--<()>-
Method 1:
1 - Switch ON your Samsung Galaxy S4 with a NOT ACCEPTED SIM Card.
2 - Samsung Galaxy S4 will ask for "Password".
3 - Enter the Unlock Code.

OR (if the Samsung Galaxy S4 shows "Insert Correct SIM Card")

Method 2:
1 - Switch ON your Samsung Galaxy S4 with a NOT ACCEPTED SIM Card.
2 - Don't bother about what's being displayed on your Samsung Galaxy S4.
3 - Compose : #0111*CODE#.

You may download the manual from http://www.samsung.com/ae/support/model/GT-I9190ZWAXSG-downloads

Do you mean the Epic or Epix? The model number for the Samsung Epix is SGH-i907, but it doesn't look like Samsung has published the model number for the Epic yet -- it can't be found anywhere on either the Samsung or Sprint site. The release date is slated for August 31st, so the model number should be made available before then.