Comments on: iPhone Field Test gives Frequency Usage

By: MATEO

MATEO — Wed, 03 Mar 2010 02:36:37 +0000

JOE, NO – THE IPHONE WORKS ON 850, 900, 1800, 1900 AND 2100 MHZ. TMOBILE 3G IS ON 1700 MHZ ANDY.

By: Joe

Joe — Wed, 04 Nov 2009 19:39:37 +0000

Can you make the iPhone transmit short bursts of data (less than a 1 second) in some other frequency like 430MHz or 285MHz?

By: andy

andy — Mon, 22 Jun 2009 17:55:00 +0000

Is there a way to connect to t-mobile’s 3g network that is on 1700 MHz and 2100 MHz?

By: pete

pete — Sat, 28 Mar 2009 21:51:36 +0000

how do I use my 2.0 software to tell frequency? 800MHZ or different?

By: iPhone FieldTest « Airborn’s Bla-Bla-uri

iPhone FieldTest « Airborn’s Bla-Bla-uri — Wed, 18 Mar 2009 16:40:39 +0000

[...] Mai multe detalii aici [...]

By: peter frank

peter frank — Thu, 26 Feb 2009 20:49:41 +0000

is there anyway of finding out the signal strength of ATT in my zip code?
peter frank

By: pauls

pauls — Sun, 01 Feb 2009 14:05:59 +0000

attbob,
My iPhone shows an ARFCN of 33469. How can I tell what frequency band, 800 or 1900MHz, my iPhone is using from that number?
Thanks

By: attbob

attbob — Thu, 04 Dec 2008 07:38:52 +0000

drr – ARFCN stands for Absolute Radio Frequency Channel Number. ARFCN is a radio channel numbering scheme used to identify specific RF channels in a cellular mobile radio system.

Tim – You Can’t change to a different tower. The iphone will pick the strongest cleanest signal as it’s checking these criteria all the time and reporting the info back to the network of your current serving cell.

Chris & Waldo – see my answer to drr. Furthermore, looking at the data in “Serving Cell” the first three fields are in HEX format. There are converters online to calculate the decimal equivilant. The LAC is the “area” code for the geographic area your network is serving. It will change if you move out of the area. The AT&T Mobility Cell Id in decimal is the tower code+the sector. Usually there are 3 sectors A/B/C. The 2nd, 3rd and 4th decimal numbers indicate the tower/cellsite. The last number is usually a 1, 2 or 3 indicating the sector you are connected too. In the upper left hand corner, the 5 bars are replaced with a decimal indicating the power ratio in decibels (dB) of the measured power referenced to one milliwatt. These are measured on the negative side of zero so of course the closer you are towards a positive number, the stronger the ratio is and likewise a better chance of good service. Anything above a -85 is shows as 5 bars. Anything below -105 is zero bars and loss of connection usually occurs. In the “Network Information” the “Serving RX level” is a better indicator of the quality of signal that can be passed and it’s updated more frequently. Higher numbers are better than lower numbers. 70 is way better than a 4.

Mark – You can’t change frequencies. You can turn of enabled bands. But frequencies which are tied to ch numbers are calculated and assigned by the network your on.

By: Mark

Mark — Sat, 18 Oct 2008 12:33:36 +0000

I am try how to find a way to change the frequency on my I9 cell fone where you go to in phone menu

By: Waldo

Waldo — Wed, 06 Aug 2008 07:09:16 +0000

In 2.0 after a little bit of searching, feel as if i have found the equivalent.
1. Enter Field Test Mode
2. Cell Information
3. Neighbour Cells
4. Here you have the list of nearby towers, once again highest strength on top.
I use Rx Level as an indicator of signal strength. Notice upper left hand corner no longer has bars as a signal strength indicator but a number (gasp!) that appears to be indicating overall strength.

Word, no factual evidence to back up my findings but seems to make sense in my mind.