LG T375 T3 hard reset
1. Turn off the phone
2. Press and hold the VOLUME UP + VOLUME DOWN and POWER key.
3. Press VOLUME DOWN to perform the factory reset.
or
You can use LG Mobile Support tool to repair some LG cell phone model, after download select menu Customer Support > Recovery Phone
To soft reset your LG T375 - remove and reinsert battery

If you know LG T375 Cookie Smart hard reset with buttons / keys pls leave comment.