Have you tried a factory reset to restore the Tablet? Please ensure to back up all important data http://www.samsung.com/uk/support/skp/faq/1034597.
If this does not work, have you tried contacting your internet provider? Sometimes, if there are a number of devices using the same wi-fi connection, they can interfere with each other. Your internet provider will be able to assist you with this.
Hope this helps.
answered 3 weeks, 1 day ago
0out of 0found this answer helpful.