I need to free more internal memory on my ZTE z812 Maven running Lollipop Android 5.1.Can I delete any of the preinstalled apps (e.g. Amazon, AT&T Drive mode, AT&T Navigator, Games, etc) to free up internal memory? I am guessing that even if the answer is 'yes', I have to disable the apps fi

I was given an unlock code for my zte z812 and it wont work  what can I do?

I have a ZTE Z812 android. All of a sudden, the phone is frozen, so I cannot swipe up to the passcode screen to enter my passcode. Occasionally, I can access the passcode screen, but I can only enter 1 digit of my passcode. The quick settings bar at the top of the screen has started blinking rapidly

I bought my phone (ZTE Z812) back in Feburary 2016 and everything was fine until the first week of August. My phone started to be out of balance due to of my parents that has been using my phone. I waited until I could refill my phone again but then when I refilled my phone on August 26th, my phone

I have family map so I can locate my one NON-iPhone device. it's a ZTE Maven (Z812) on my post-paid account. It located it ONE time, and hasn't ever been able to again. No matter if the phone is on wi-fi or not. No matter if it has GPS turned on, or locations set to battery saver. Nothing i've done