One of the coolest features of the iPhone 4 CDMA (Verizon/GSM AT&T), is the availability of tethering feature that allows users to share Internet networks from the iPhone 4 CDMA/GSM AT&T to a maximum of 5 other Wi-fi enabled devices such as PC, laptop, smartphone, PSP etc.
However, personal features wi-fi hotspots on the iPhone Verizon/AT&T requires additional subscription for special WI-Fi data tethering for about $ 20 per month. This means you will not be able to enjoy this feature if only ordinary data subscription. Mobile hotspot suport for iPhone 4 GSM (AT&T model) has officially conformed and will charge $20 per month for a 4GB data. While data PRO fee via Mi-FI costs $25/month.
How to set Up iPhone 4 Verizon/AT&T as Hotspot
1. Make sure : to activate your account with additional $20/month data plan2. Simply turn on your iPhone
3. Go to Network > Setting > Swicth on Cellular Data
4. Choose Personal Hotspot, turn it ON
5. Go to set Password access
In the experiment, the results are satisfactory with a 5-connected devices from various distances up to a maximum of about 20 feet, even in another room. It is important to note this connection using 3G CDMA EV-DO rev. A network technology. We know the maximum down-rate speed is 3.1 Mbps (in full speed). This means if there is 5 wi-fi connected to access at the same time, speed automatically will be divided into 5. This connection can also be done via bluetooth or USB cable. The same functions is as the modem / personal hotspot for Wi-Fi devices in your home. The approximate calculation is same for AT & T's 3G HSDPA service via iPhone 4 GSM model.
