Error synth unlock - Motorola Waris GP328 GP338 GP638 Plus 2-way Radio power cord cable

The internet connection [data transfer] is so poor. that's all,.

This probably caused by an feature called 'Face Unlock'; either uninstall or disable it. Usually this done by Settings --> Apps --> (All -->) Face Unlock --> disable / uninstall.

Or when you actually really like that feature, make sure you've updated your phone and that Face Unlock app to the latest version.

PS: What it actually means is the Android System UI component has crashed (and will automatically restarted afterwards). You might see the statusbar at the top disappear and reappear after a few seconds as well ... (symptom).

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.

Try to delete the app and re-install it. It's saying there was an error when it was installed.

The Error code says Login Failed.
Try clearing the cache and history, retry.

Dont try to unlock your phone with free unlockcodes which you get from some sites.entering wrong inlockcodes will brick your phone or it will be hardlocked. so its a better idea to buy unlockcodes from any trusted online vendors.

From my personal experience i would recommend http://unlockgenie.com/.
i unlocked my HTC AMAZE 4G with their help. i placed the order and i got my unlockcode along with the unlocking instructions to my mail address. the code worked fine and now i am using my HTC with my favourite network provider

Resetting the BIOS password is no easy feat. I'm not very experienced with doing this, but this article I found might be able to get you on the right track: http://www.ja.axxs.net/unlock/