Internet lags with more than one device?

I just moved into a new house with my grandparents and we recently signed on for the verizon 'high speed Internet' dsl packages wherein we were sent a modem router (2750B). I hooked everything up perfectly fine and connected the devices wirelessly. Yet when I use more than 1 of these, the connection becomes laggy an slow. When I play my ps4 and use my iphone to listen to youtube videos like i did at my old house, my ps4 an iPhone lag and I'm forced to shut one off. I'm not tech savvy, so what am I doing wrong? Do I need to upgrade or change services? Btw, my download/upload speed is 800kbps/350kbps if that helps.

Why does my iPhone 4s keep freezing?

My iPhone 4s that I have had for a little under a year now, keeps freezing on me and I don't know why. Whenever I try to open an app such as Facebook, Twitter, YouTube, my games, etc. My whole entire phone freezes for a couple of minutes if not longer. I try to shut it down and then turn it back on again, but it won't even let me do that, it stays on the same page that I was opened on. Could my iPhone 4s be corrupted? Or could this be some rare strange virus thing? Please help, I'm kinda nervous, I don't want it to be broken.

How to save my iPhone after falling in water?

I knocked my phone by my elbow into my hot tub and it was only in water for less than 5 seconds. When I pulled it out I immediately dried it and tried sucking the water out from any holes. It was in a rubber case so I imagine thats why it was fairly okay. The buttons work. The top and bottom but the LED light came on. The actual screen comes on and looks like its working fine but I can't slide the screen to enter my password or anything. So basically everything but the screen works, even through the screen still comes on display when I turn the display on. I'm imagining it's not that damaged if it's just the screen, but I don't know what to do?

Can I do this if I repair the water damage on a iphone?

So, I had a old lg fliphone. And it was dropped I. Water and wouldn't turn on. So I got a paper towel and some toilet paper and a anti dust screen wipe, and dried it off. It worked fine except for the LCD that water in it. But I had a good phone after it was fixed. I was wondering if someone were to do the same to a iphone, would it work?

Sound not working on iPhone 3?

So I have an iPhone 3 and the sounds not working anymore, like it works with earphones but yeah it doesn't even ring or anything like that. Does anyone know how I can fix this?