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379 posts

Ultimate Geek
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  # 240226 29-Jul-2009 17:43
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I've logged this problem with vodafone and they have been calling me every day (at least) to try to solve it. They have "escalated" the problem beyond the entry level help desk, which is good news. I suspect it's a combination of a network problem and a design flaw in the iPhone 3G and 3GS. Download speeds lock in at around 115-117 kbps if the phone is taken into an area of low 3G signal strength, where the phone still indicates 3G service, but not into an area where the service downgrades completely to 2G. Taking the phone back into the high signal strength 3G area results in download speeds remaining at 115-117 kbps. Higher 3G speeds can be regained by one of three methods: 1) switching the 3G service off and back on again, 2) switching to airplane mode and back again, or 3) powering down the phone and powering back up again. Note that merely turning off the screen using the button at the top of the phone achieves nothing.

A co-worker of mine has the same problem on his iPhone 3GS. We did a comparison test in the same room at the same time using the SpeedTest.net application.

My last experiment today was to insert my SIM card into a 3GS phone at a vodafone store. Unfortunately the problem was not replicated, most likely as the phone would have to disconnect from the vodafone network and then re-establish a connection, thus effectively repeating step 1 as stated above.

How to fix this problem? Good question. Maybe the upcoming 3.1 OS update will be the solution. Maybe...

Tomorrow's experiment: I'll try to connect to the only tower I know that is HSUPA in Dunedin and report back. Not sure if the iPhone will connect to HSUPA though. Most 3G towers are HSDPA in Dunedin, I believe, but I am open to correction.

One other (off topic, admittedly) issue: I noticed that my 3GS was decidedly yellow in colour compared to a 3G iPhone. The vodafone representative reported that he'd seen one 3GS phone screen that was beyond yellow, and had turned brown. Factory recall, anyone?

David Everett





Wob

310 posts

Ultimate Geek

NBN Co

  # 240235 29-Jul-2009 18:05
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Which cell site are you talking about in Dunedin?




 

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379 posts

Ultimate Geek
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  # 240237 29-Jul-2009 18:07
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Green Island.





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Uber Geek
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  # 240242 29-Jul-2009 18:19
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Every single 3G cell is HSDPA and many have HSUPA

Wob

310 posts

Ultimate Geek

NBN Co

  # 240247 29-Jul-2009 18:24
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Is that the new roadside/pole beside the motorway off-ramp? That one is 3G 900MHz whereas most of the other Dunedin sites are 2100MHz, certainly the older ones.

I'm not sure about that particular site supporting HSUPA when other sites don't - they should all be the same apart from the frequency.
(I'm not even sure about the difference between HSUPA and HSDPA - I looked on wikipedia and all I got was a headache!)




 

Now based in Perth WA.

Check out my blog
Any comments or posts are not necessarily the opinion of my employer - who are bloody marvelous by the way.


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Master Geek
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  # 240406 30-Jul-2009 00:07
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I'm in Three Kings, Auckland and get a pretty good signal - never dropped back to 2G that I've noticed.
Vodafone 3G - 2238kbps down - 355kbps up.

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Ultimate Geek
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  # 240696 30-Jul-2009 18:28
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My 3GS only picked up a 2G signal in the Green Island (Dunedin) area. I was under the impression there was a HSUPA service at this location, so it must be 850 MHz. Speeds were around 30 kbps down and 50 kbps up.


Here are a few other speed tests taken during my travels earlier this week. These were the highest speeds attained over several tests.


Dunedin airport: 1.2 Mbps down, 347 kbps up
SkyCity Auckland: 764 kbps down, 356 kbps up
University of Otago: 923 kbps down, 329 kbps up


I'm stuck in the 116 kbps rut at present, so I'll need to turn off 3G service then back on again to get partly decent speeds.





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  # 240703 30-Jul-2009 18:46
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DrCheese: My 3GS only picked up a 2G signal in the Green Island (Dunedin) area. I was under the impression there was a HSUPA service at this location, so it must be 850 MHz. Speeds were around 30 kbps down and 50 kbps up.


Check the vodafone coverage map this breaks it down

324 posts

Ultimate Geek


  # 241047 31-Jul-2009 17:26
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there is nothing wrong with vodafone network. it's the problem of the iPhone itself. use iPhone on telecom will result in excellent signal and speed. and there are many other things that might reduce the speed. yes vodafone doesn't offer solid 2100mhz signal. yes iPhone doesn't lock itself to 3g only. the only way is to switch to telecom and you wont be disappointed. this was what I did. 850mhz is superb in so many way.

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Ultimate Geek
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  # 241048 31-Jul-2009 17:37
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Your comment makes sense. It's clear XT is the better network for the iPhone.

I found instructions on Geekzone to allow a Telecom SIM to make/receive calls, data, and even put a nice XT logo at the top of the iPhone screen. Are there any instructions on converting back to vodafone that you are aware of? I've not come across this yet. I'd like an escape route to be put into place in case XT is not to my liking.

Cheers,

D.





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  # 241049 31-Jul-2009 17:55
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harrylin: there is nothing wrong with vodafone network. it's the problem of the iPhone itself.



Hahahahahahahahaha, please tell me you're joking!!!

1937 posts

Uber Geek
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  # 241137 1-Aug-2009 07:41
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Hi from Dunedin.

I would like some advice on how best to perform a comparative XT vs. Vodafone on my iPhone 3G in Dunedin.

As part of the "real world" tests I plan on running the test on both networks at the same location one after the other. The 3 locations are probably going to be the Octagon, downstairs in the Meridian food court, and on campus.

I plan to use the Christchurch test server.

Any corrections I need to make?

Should I be resetting the 3g signal before testing VF or not? (which is fairer)

And how much data (up and down) does a single speedtest (using speedtest.net app) use each time it is run?

Thanks

1321 posts

Uber Geek
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  # 241171 1-Aug-2009 11:28
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Rumour has it that the very very poor 3G download speeds here in NZ are due to the fact 3G drops down to GPRS QOS on 3G 2100mhz.
A ticket has been lodged with Apple.
Whether a fix will be in next firmware update is unknown at this stage.
Up till now 3G speeds reported around New Zealand have been down to 116 kbps and this would account for this low d/l speed.
I did tests myself and most readings were around this level with the occasional peak over 1 Mbps
I was with another person who was using a Nokia 6121 and he was getting significantly faster speeds.
Plus people on VF sticks can get much faster also-
HSDPA is up to 7.2 Mbps in theory




GZMCC. Nokia Lumia 1020,Microsoft Surface Pro 4 i5 4Gb Ram,128gb, Cam Am Spyder F3 LTD.  GoPro 5 Black, Samsung Gear 3, Huawei P30 Pro


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Uber Geek
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  # 241192 1-Aug-2009 12:44
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psychrn: Rumour has it that the very very poor 3G download speeds here in NZ are due to the fact 3G drops down to GPRS QOS on 3G 2100mhz.
A ticket has been lodged with Apple.
Whether a fix will be in next firmware update is unknown at this stage

Is Dunedin only 2100Mhz for 3G?

And if this is a network issue, why was this not picked up last year with the launch of iPhone 3G?

652 posts

Ultimate Geek
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  # 241194 1-Aug-2009 12:57
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ahmad:
psychrn: Rumour has it that the very very poor 3G download speeds here in NZ are due to the fact 3G drops down to GPRS QOS on 3G 2100mhz.
A ticket has been lodged with Apple.
Whether a fix will be in next firmware update is unknown at this stage

Is Dunedin only 2100Mhz for 3G?

And if this is a network issue, why was this not picked up last year with the launch of iPhone 3G?


As far as the iPhone is concerned on the Vodafone network, yes

On the Vodafone network, the iPhone can only use the 2100MHz side of the network for 3G. The iPhone also has an 850MHz chip for 3G but Vodafone does not have an 850MHz network (XT does).

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