I've been connected to my house wifi using my iPad2(iOS7.1.2). The wifi connection has been excellent for a month with 9Mbps for download and upload speed. Just a few days ago, suddenly the download speed drop to 4Mbps, but the upload speed is good at 9Mbps. I tested my house wifi connection with android phone and windows 7 laptop, it is solid 9Mbps download and upload speed for both. I tested with iPhone 4s and 5s, both also getting 9Mbps download and upload speed. I use the same iPad2 to test on my friend wifi connection(different ISP), and the download and upload speed is good. Got a 9Mbps on download and upload speed. At first, I thought it is my iPad problem, ironically it works well with other wifi connections(but not my house wifi). It's not iOS as well since both iPhone 4s and 5s run the same version, 7.1.2. So what could be the reason for this weird wifi connection issue? I renew the wifi lease, I forget the network, I reset network settings, I reset all settings, but it is still the same, 4Mbps for download and 9Mbps upload speed. I want to blame on the router setting or the ISP, but it seems my house wifi connection is working well with iPhone. Is it possible that iPad required different router/firmware setting from iPhone(be reminded both on same iOS version)? My only guess is my iPad has some unknown issue with my house wifi connection(since it works well on other wifi connections). If this is the case, what could it be? What is the solution? Or do you guys have any other logical explanation? Please help, I am stranded in the middle of nowhere with no one able to offer any clue. Thanks in advanced.