Breast implant can be done many months or even years after mastectomy. During reconstruction, a plastic surgeon creates a breast shape using an artificial implant.
It’s also important to know that while breast reconstruction rebuilds the shape of the breast, it doesn’t restore sensation to the breast or the nipple. Over time, the skin over the reconstructed breast can become more sensitive to touch, but it won’t be exactly the same as it was before surgery.

The terms are used loosely and often wrongly for the different devices. The booster should more properly be called a repeater, it picks up the routers signal and sends it out again so extending the reach, so it may be called an extender. Then some devices are sold as extenders when they are really wireless access points either wired back to the router or connected to it using powerline ethernet extenders. The access point devices have a slight advantage as the repeaters make the connections in two wi-fi hops, the access point is one hop and a section of ethernet.