[quote=hobbes1001,Dec 22 2011, 10:25 AM]
[quote=rajivshm,Dec 22 2011, 12:13 AM]
that means any phone turn off 3g also will only turn off data, but the line still use 3g? may be true. the signal has 3g but our phone only take 2g.
example my old nokia 5800 xm, once i turned off the 3g, my battery lasted longer. i was only on prepaid. no data plan and rarely online from my phone. only use for calls n sms but battery drains quickly. then read on LYN that i shud switch off 3g, and miracle the battery lasted wat longer. at least 40% longer.
so, if we follow what this guys says, even off 3g, no difference, how could my phone consume less energy@battery?
1. For iPhone 4, you have two toggle, one for Cellular Data, One for 3G
2. For iPhone 4S, you only have one toggle which is Cellular Data
Since iPhone 4S no longer has the capability to turn off 3G. Turning off cellular data will not have the same effect as iPhone 4.
There is a reason why apple list two type of talk time in their website. One for 3G & one for 2G. That's because you can use 3G network to make calls. It is suppose to be clearer.
The easiest way to test this is by doing the following:
1. Turn off cellular data (but leave 3G on for iPhone 4)
2. Go to Carrier
3. Switch Network Selection to Manual
4. It will give you a list of network available
If you do the above in a uMobile 3G coverage area, you will see uMobile in the list.
If you do the above with a iPhone 4 with 3G OFF / cellular data OFF, you will not see uMobile in the list.
This shows that by turning cellular data OFF does not turn off the 3G in your iPhone 4S
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aahhh i see i see, ok ok thanks for clarifying