If you use a Android device google can track you via scanned and known wifi Networks without any connection! Android scans your area, shops, stores for public wifi networks, via LTE / GSM the OS verify the Data online at Google. As Result Google Maps sends you Popups to VOTE the last visited Places at Google Maps.
That’s all WITHOUT GPS and WIFI connected only LTE/GSM !
Purge Google Account! (disconnect!) and disable all unwanted Google Apps especially Uploaders (Backups) then go Android Settings -> Wifi -> Advanced Wifi Settings!
Disable the „local wifi scan“ option switch at Android!
There’s no guarantee that google or other company’s can re activate it again or run the service as hidden tool!
No one knows which apps do run this tools at Standby Mode on Background!
To be safe remove the Battery of the Phones! or put it into a Metalbox (Copper Faraday Cage)
If you use a Smartphone or Tablet be sure that the Browser like Firefox, Icecat Opera are not active at „minimize“ mode, if the Website code uses a „auto“ refresh code the Browser will endless load the sites on Background! This burns your Data Limit to zero..
Swipe unused apps to Top of Screen!
Control by tapping onto the Square Button!
Use Data Traffic Control Apps default addon tool of Huawei
If you use a Amazon Kindle Fire 2015 (45$) Generation „Ford“ or other Android Tablets,Smartphones you must know some MAJOR Informations about the Firmware Handling.
If you were asked by the Fire OS or Android to „Upgrade“ the Firmware OS, DON’T PUSH YES it without READING DETAILS! I prefer ALWAYS NO FIRST!
Use ALWAYS a SDCARD to hold the MAJOR Data of your Tablet, cause if bricked or damaged you can’t pull off the DATA!!!
Android Firmware Images INCLUDE not only the OS, it includes DRIVERS, and the MAJOR BOOTLOADER!! Cause Android Devices use no real BIOS!!
If you Upgrade, you can RUN into BIG TROUBLE! Broken Drivers like no WIFI connect, freezing Screens on Boot, or BRICKS like the „BLACK SCREEN of DEATH“ which destory the Tablets cause you can’t reach the BOOTLOADER for RECOVERY MODE and SITELOAD the FIRMWARE again!
UPGRADES to bigger Version Releases like 5.1 to 5.3.X CAN’T be DOWNGRADED! Cause the DOWNGRADE don’t force overwrite correctly the BOOTLOADER, or leave the NEW BOOTLOADER untouched which can’t find the old KERNELS Names!
As MAJOR INFO you should know that the „adb shell tool“ is a DEVELOPER TOOL which doesn’t ASK anything to confirm, if the Firmware File is wrong or damaged! It flashes without any testing and any protection check! YOU have to KNOW what you ENTER!
You can’t reach anything, if the Tablet is BRICKED and you can’t reach the RESCUE MENU MODE! Cause NAND Chips need a connect from adb shell tool to USB then to EEPROM Chip!
After reboot test the Tablet, the ads should be gone..
Remark: if you remove the Account you don’t need this workaround, and if the account is removed and you try to login later the ads are displayed again. The Tablet is yours!
Update: Since Firmware update to 5.3.X the Amaz Developers seems to run a cronjob which enable the Ads again after some time! Try to block from calling home the Tablet via your Home Router Outgoing Firewall! Or if you use a DNS Server set the amazon update domains to 127.0.0.1 at the DNS Server Hosts File. Then the Tablet isnt able to pull commands and force ota Updates!
Block this Domains (or disable all Internet on the Kids-Rules of Firewalls):
If you use a Android Smartphone (other Mobile-OS same) you should take a minute to get back your privacy and security!
This points helps to prevent, but there is no warranty for 100% protection!
First every Smartphone offers a Factory Reset, search it on Settings and DO it! This prevent you from Firmware Spam by the Reseller! (Samsung, HTC..)
Boot the Phone without inserting a SIM card, create a fake account to get Updates and Software over a PUBLIC WIFI Network (Coffee Shop, Freifunk)
Install wanted Apps, then go to Settings now to accounts, PURGE the fake account.
Disable / Purge Apps on the Settings, of Apps that you never will use.
Check on Settings which App is running by timer, if not needed disable it.
Check Webbackup Apps and disable or prevent them from calling home, (Default builtin Android Firewall)
DON’T setup your REAL Email Account which is used for Home Banking or Online Shopping, CAUSE the OS is open like a Swiss Cheese with holes! (Less Updates by Manufacterer) or to PROTECT your phone from being hijacked by a E-Mail Virus
Encrypt the Phone, and SET Screenlock with Password longer than 8 Digits, same on SIM Unlock Code!
Backup the Smartphone by USB Cable Monthly to a full encrypted PC!
If you are not a newbie, look for Browsers like icecat-apk on the Open Source F-Droid Shop which are more secure
Try Tor Browser later! For more Security!
DON’T Enter words, names, numbers who are CONFIDENTIAL! Cause Smartphones are like papers on a public table without real protection!
Try to use the „Quick Switches“ of the „Screen Pull Down Menu“ of the Home Screen where Data, Autosync and Flightmode can be used.
If you use Messenger Apps check their Settings to disable Download of „Video, Images, Files“ this can be a Backdoor too!
Disable „Video Autoplay“ on Apps like G+ or Facebook.
Use every App with a own fake Account.
NEVER leave your Phone on a public table, cause the USB Port is always open and AUTO Connect every plugged in Cable!
Put a black Strip on the Camera lens if you don’t need them! especially the Front Camera!
Call your Phone Provider, to disable the transmission of MMS/SMS! This prevent Messages with bad links.