princessfluffy :
Hi im a noob when it comes to these kinds of stuff >.< Internet in my area is really slow and im wondering if getting a repeater can help my mifi? I'm using Huawei e5330 and i get like 30-90kb downlad speed :/
The e5330 is a 3G device, so 30-90 KB/s may in fact be the best it's capable of. It depends on the strength of the 3G network it's connecting to.
Talk to your cellular internet provider and see if they offer a 4G device and if your area has 4G service.
Try taking the e5330 upstairs and placing it near a window as suggested. If speeds improve, you might just be in a poor service area. In which case a cellular signal booster may help. That's a device you mount onto your roof, which receives cellular signals, boosts them, and rebroadcasts them into your house. However, they are very specific as to what carriers, bands, and type of service (3G or 4G) they support. So you really have to do your research before buying one. Also, unless you have some way to test the signal strength from the roof (e.g. if your phone uses the same cellular provider), there's no guarantee how much a booster will help.
Are you in a rural area, or are there other people nearby with the same slow internet problems? Often a solution which is unaffordable for one person can become cost-effective if you and a dozen neighbors and businesses pool your resources.