No...you don't need wifi for the American idol app for iPhone.
No you do not need WIFI to use the iPhone. The iPhone works with either 3G or WIFI. Some apps require WiFi to download or run depending on their size. I find wifi works best though and is faster. YouTube videos are extreemly clear and crisp with wifi.
Unless you have downloaded them, you need the internet.
If you have an Ipod Or Iphone you can get textplus but you need wifi
No.You need a carrier.
probably because you don't have a strong WiFi signal
Yes, it does need wi-fit if you don't have an iPhone
no you can use the mobile network for Internet
Yes or public wifi
Yes
Yes
Via wifi. You will need to download a texting app