Error message battery will explode unless push ok. Virus?

Try theses steps:
1) clear cache and data for Google play and google mail
2) logout from Google and log back in
3) reset router

If these fail the only other fix is for the android OS to be deleted and reinstall. At this point unless you are very knowledgeable I would suggest contacting samsung for repair.

If this is a warning message, it may be hoax software. I have seen this before, but I am sorry that I don't remember how to fix it. However, you might search internet for the specific message and you can rid of it. Don't respond to the message though.

How to set up and use email on an Android tablet - PC Advisor

www.pcadvisor.co.uk/.../how-to-set-up-and-use-email-on-an-android-tab...

Apr 18, 2011 - Setting up an email account on your Android tablet is not a tricky task, and on our Samsung Galaxy Tab it is extremely straightforward. But you ...

New emails not showing up in Gmail app - Android - Stack ...

android.stackexchange.com/.../new-emails-not-showing-up-in-gmail-app

Aug 2, 2013 - I have 2 different Android devices: a Samsung Galaxy Reverb ... I have to manually change from Priority Inbox to Normal Inbox (or vice versa) in order for the new emails to show up in my list. ... Why does the new Gmail address not show on the Samsung tab 2 version 7.0? ... Turn PS3 Slim into Linux server.

How to Set Up E-mail on the Samsung Galaxy Tab - For ...

PDF]User Manual Manua - Verizon Wireless

cache.vzw.com/multimedia/mim/...galaxy_tab2/galaxytab2_manual.pdf
relating to the SAMSUNG Galaxy Tab, including but not limited to, ... network solutions selected by the software provider, solution provider or user. ..... 2. Push the 4G LTE SIM Card in gently to release the lock. 3. Carefully slide the 4G LTE SIM ...

Support - Wi-Fi Tabs GT-P3113 ' Samsung Galaxy Tab

www.samsung.com > ... > Galaxy Tab > Wi-Fi Tabs
Samsung ElectronicsVisit Samsung today for Samsung Galaxy Tab® 2 7.0 (Wi-Fi), 8GB. You'll find ... Manuals. User Manual ver.1.0 (EN, 4.95 MB). Jan 29, 2015. Download (pdf)

Support - Wi-Fi Tabs GT-P5113 ' Samsung Galaxy Tab

your battery is defective. contact Samsung

go to settings --- application---uninstall, remove app data
OR
you can reset but data will be lost

Have the emails been deleted?
The sent items should contain all of your emails that have been sent unless you have deleted them.

If you need further help, I’m available over the phone at https://www.6ya.com/expert/michael_e0539de310ea5ad7

Go to manualsonline.Com and type in search Samsung Galaxy tablet

Is your Samsung Galaxy Tab locked with any particular network?If so..when you insert other networks sim..it will show error messages like network error/invalid sim etc.I suggest you can approach your network provider and get the unlock code for your device.You can follow the free unlock instructions from Mobileunlockguide.com and enter the unlock code easily.This way you can unlock the device very easily.

See if you can reset the electronics without losing your data. Check with outfit that provided your phone.