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2012-12-28
, 11:08
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Posts: 181 |
Thanked: 82 times |
Joined on Jan 2010
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#32
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3G is Release 99 UMTS. Whereas, 3.5G is WCDMA (enhanced UMTS) with HSDPA and HSUPA enabled. There can be Node Bs (BTSs) with 3G enabled (without HSDPA/HSUPA) and in such a case, it should show 3G. If your serving Node B is HSDPA and HSUPA enabled, it should show 3.5G. and your serving cell is not HSDPA/UPA enabled, it shouldn't show 3.5G. This is perfectly normal.
Remember, with Release 99, you can only get downlink speeds only upto 384 kbps whereas with HSDPA enabled, you can get speeds upto 14.4 Mbps (without DC/MIMO).
And yeah, this is the theory part.
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2012-12-28
, 11:20
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Posts: 308 |
Thanked: 299 times |
Joined on Jul 2012
@ Graveyard
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#33
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Thanks. Anyway I don't care if my phone shows 3G or 3.5G. I only want to have a stable connection, and it seems that in big cities (where 2G,3G 3.5G nodes co-exist) the intenet connection freezes when auto-switching from 3G to 3.5G and then back again after an inactivity period. By the time being, the only workaround is to use the 2G network, which works OK in big cities, but is very slow.
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2012-12-28
, 11:43
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Posts: 181 |
Thanked: 82 times |
Joined on Jan 2010
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#34
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AFAIK, 3.5G and 3G doesn't co-exist on a BTS (Mac-hs architectural changes needs to be done for HSDPA/UPA). If you are seeing a 3G to 3.5G switch, I believe it should be a serving cell change or you are downloading something after staying inactive for a while? If you are facing difficulties in accessing 3.5G network, it should be because of network overload - though I agree it can't happen always but you've also mentioned that you are able to re-register on to 3.5G network after a while. Your operator should be able to fix it if it is a bug at their end once you let them know the issue because I don't see any reason why a particular phone should be denied access to 3.5G network...
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2012-12-28
, 17:58
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Posts: 1,258 |
Thanked: 672 times |
Joined on Mar 2009
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#35
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2012-12-28
, 20:17
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Posts: 181 |
Thanked: 82 times |
Joined on Jan 2010
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#36
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Power use in 3.5g mode is pretty high, a bit higher than having a voice call active. Anyway, since the decision to drop down to idle 3g depends on data transfers, a "ping -s 1400 google.com" in a terminal might be enough data to convince network to keep you on 3.5g. As I said before, however, you'll get less battery life doing that then the declared talk time.
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2012-12-29
, 12:21
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Posts: 181 |
Thanked: 82 times |
Joined on Jan 2010
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#37
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The Following User Says Thank You to ikerrg For This Useful Post: | ||
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2012-12-29
, 14:06
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Posts: 1,258 |
Thanked: 672 times |
Joined on Mar 2009
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#38
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2012-12-29
, 18:56
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Posts: 181 |
Thanked: 82 times |
Joined on Jan 2010
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#39
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I've never found or seen a phone so far that doesn't have issues like this, if not on one operator in one city, then on another operator or other city..
Remember, with Release 99, you can only get downlink speeds only upto 384 kbps whereas with HSDPA enabled, you can get speeds upto 14.4 Mbps (without DC/MIMO). And yeah, this is the theory part.
Last edited by ranbaxy; 2012-12-28 at 11:24.