...Typical they have a budget Chinese mobile phone.
Are you sure WPS is turned off? On both 2.4 and 5ghz?
WiFi is so cheap in this country, it's mad to think they're going to all this hassle. Mobile phones have small antennas, it's unlikely to be much further from one of the neighbours, where is your router in the home? 5Ghz barely covers a normal sized house, let alone going beyond many of the neighbours.
Do you have ANY powerline plugs in the home? Any WiFi extenders? Anything other than the main router?
Who is your ISP? E.g. if you have BT, their SmartHub has protection against these WPS attacks out of the box. It's also fairly good WiFi (AC2600 which is better than the netgear) and might be an option to get something cheap and quick.
Steps to try:
1. Check WPS is fully disabled
2. Check any remote management is disabled
3. Ensure no homeplugs are connected - these can connect to neighbours home wiring. It wouldn't be the first the the neighbours have a powerline WiFi extender, which routes back to next door, so whilst they see they're connecting to their home SSID they're getting an IP to next doors router.
4. Update to latest firmware for the router
5. For any wifi extenders ensure WPS is turned off here also
6. Use a long complex password
7. Use WPA2 only
Edited by ukhardy07 (Sun 31-Dec-17 00:37:34)