laptop getting a very weak signal from router & sometimes its unusable

laptop getting a very weak signal from router & sometimes its unusable

i own a rental property with 2 apartments right next to each other. the front unit allows the back unit to use their wifi via their router but the back gets a very weak signal or sometimes none at all. the units as i mentioned are literally right next to each other & only separated by a wall. the apartments are not huge, i dont know how far away the router is exactly but it cant be far. the entire building is only 1300 square feet.

any ideas or suggestions on how i might be able to fix this?

Explosives. Lots of them.

Assuming you cannot remove walls, the easier way would be to move the router around until the connection strength is acceptable.

There are also wireless range extenders.

And more involved options, but I doubt they will allow you to tinker with their router.

If you can't mess with their router, you should consider getting a wireless repeater. I recently bought an Amped Wireless 150 repeater for a similar problem in that my laptop downstairs was getting a very weak signal ( 1 - 2 bars) from my router two floors up. With the repeater in place, I get five bars now!