Hi,
Not sure about your tablet if the following settings are available, but you may wish to check and see if changing them improves your WiFi performance.
Go to ''Menu > Settings > Wireless and Networks > WiFi >'' (tap the three dots? not sure of this for your tablet) ''Advanced.''
1.'' WiFi Frequency band '' set it to ''2.4MHz'' instead of 5MHZ or both.
2. ''Keep WiFi on during Sleep'' - set it to ''always'' if not set to this already.
3. ''WiFi Optimization'' - set to ''off''
4. ''Network notification'' - set to ''off''