Resolved Possible to tell which type network you're connected to?

[biohead]

Is there any way of knowing which frequency band the iPhone 4 is connected to? Such as UMTS900 or UMTS2100?

Jump to Post #5 for solution

I ask as O2 UK have actually started rolling out 3G over 900MHz as well as the "old" standard 3G @ 2100MHz, and I really just want to check if it's anywhere around the University's buildings.

And here's the "evidence" that O2 have started the rollout: http://news.o2.co.uk/Press-Releases/O2-first-to-switch-on-new-superfast-3G-900MHz-network-2f8.aspx

Since being granted its new network licence in January, O2 has already deployed 3G900 services in key cities across the UK, including Leeds, Birmingham and Manchester, with other cities set to follow in the coming months.

 

[jdaniel]

Is there any way of knowing which frequency band the iPhone 4 is connected to? Such as UMTS900 or UMTS2100?

I ask as O2 UK have actually started rolling out 3G over 900MHz as well as the "old" standard 3G @ 2100MHz, and I really just want to check if it's anywhere around the University's buildings.

And here's the "evidence" that O2 have started the rollout: http://news.o2.co.uk/Press-Releases/O2-first-to-switch-on-new-superfast-3G-900MHz-network-2f8.aspx

*3001#12345#* and tap Call. Enter Field Mode.

But I looked in there myself and I cant determine what its on take a look yourself

 

[biohead]

Doesn't seem to tell what frequency you're using though.

 

[jdaniel]

Doesn't seem to tell what frequency you're using though.

thats what I thought when I was looking through but wasnt too sure.

 

[biohead]

Want to thank DBMandrake at 3GForum UK for finding out how to do this:

Yes it's possible.

Go into field test mode by dialling the number *3001#12345#* and pressing Call.

Once in field test go to UMTS Cell Environment->UMTS RR Info, and look for the field "Downlink Frequency".

There is a full list of channel numbers on this page:

http://en.wikipedia.org/wiki/UMTS_frequency_bands

But in summary:

* UMTS 2100 - Downlink will be between 10562 - 10838.

* UMTS 900 - Downlink will be between 2937 - 3088.

For example right at this moment my phone on Three is showing 10564 for downlink.

Sometimes this may show 65535 when idle which is invalid, but just wait a few seconds and it should change. Turning off wifi to cause a 3G data session to stay active may help.

Bear in mind that the phone can and will switch between them as it desires so it could change in the middle of your test.

If you can find "Downlink Frequency" in the field test mode of other models of phone this should work as well.

http://www.3g.co.uk/3GForum/showpost.php?p=461149&postcount=26

 

[reclusive46]

That method doesn't seem to work anymore. The downlink frequency looks empty.

 

[Thetonyk123]

That method doesn't seem to work anymore. The downlink frequency looks empty.

this is an old thread

 

[reclusive46]

this is an old thread

I know but I wanted to see if anyone had a solution on the 4S in iOS5