Q: Why does original iPhone show a different number of bars than iPhone 3G in the same location? A: The original iPhone uses 2G only (EDGE and GPRS), while iPhone 3G uses 3G and 2G and will use the best network available at any given time. Note that most carriers have greater 2G network coverage than 3G, but 3G network coverage continues to grow. link »
Friday, December 25, 2009
iPhone 3G: Understanding cellular data networks
iPhone 3G: Understanding cellular data networks
Q: Why does original iPhone show a different number of bars than iPhone 3G in the same location? A: The original iPhone uses 2G only (EDGE and GPRS), while iPhone 3G uses 3G and 2G and will use the best network available at any given time. Note that most carriers have greater 2G network coverage than 3G, but 3G network coverage continues to grow. link »
Q: My carrier's coverage map indicates that I should have 3G coverage, but I am not getting it. What should I do? A: The coverage maps presented by carriers such as AT&T typically represent an approximation. Contact your carrier if you are experiencing any coverage-related issues. link »
Q: When on a call, why does my iPhone 3G work better at 1 bar than an original iPhone? A: This is because when on a 3G network, you can communicate with more than one cell tower at a time. By design, 3G is supposed to work better than 2G in weak signal conditions. For this reason, signal bars for 2G are not directly comparable to 3G bars. The bars an estimate of how good the signal conditions are. link »
Q: Why does my iPhone 3G show 1 bar while another 3G phone shows 2 bars? A: No standard exists for mapping signal levels to actual bars. The bars are an estimate of how good the signal conditions are. link »
Q: Is 3G voice quality better than 2G? A: Yes, because 3G can communicate with more cell towers simultaneously and process more data than 2G. link »
Q: What does turning off 3G do on iPhone 3G? A: You can turn 3G on or off using Settings > General > Network > Enable 3G. Turning off 3G restricts the device to a 2G network. With 3G turned off, you will not be able to use voice and data at the same time, except when using data over a Wi-Fi connection. Note that you may get additional talk time by turning off 3G. See the iPhone 3G specifications for more information. In countries that do not offer a 2G cellular networks, turning off 3G prevents you from using the iPhone to make calls or use cellular data networks. link »
Q: What if my iPhone does not offer the Enable 3G setting? A: This setting is only available on the iPhone 3G or iPhone 3GS. Depending on your wireless carrier, this setting may not be available when using the iPhone in your home country. If this is the case, it may be available when roaming internationally. link »
Monday, October 12, 2009
Apple - Support - Discussions - What is the AT&T smtp server for? ...
Re: What is the AT&T smtp server for? The SSL is set to "off" Posted: Oct 11, 2009 7:51 PM in response to: Luba Cox Reply Email AT&T's SMTP server is for an email account that does not have an authenticated SMTP server in order to send messages with the account when connected to the internet via AT&T's cellular network. Using an account that supports SSL with the SMTP server is better than using an account with an SMTP server that does not support SSL, but when sending/receiving via AT&T's cellular network, all data is encrypted over the network, which is a GSM standard. Using an account that supports SSL with the SMTP server is more important when connected to an open wi-fi network. link »
discussions.apple.com/
Monday, October 5, 2009
SharedCopy: Nothing to download or install
SharedCopy bookmarks for every need Setup preset email address to send copies to - Share with your link »
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