Hi, it seems to be Android version and manufacturer dependent. I could find the setting on the HTC phone I was using for Wi-Fi tethering but not on a Samsung smartphone and also not on a Samsung tablet. -Martin

Fortunately not happening with Ubuntu here and all OSes I run in virtual machines. Just fast :-)

Hi Mo, no, unfortunately not. -Martin

Hi Vish, yes, 8 bits of course, thanks for the correction! Kind regards, Martin

Hi SD, as they say they will keep their frequencies it is likely that they will continue using their MCC/MNCs, each on different carriers. So from the outside it will appear as separate networks as before. Kind regards, Martin

Hello Johannes, Good point! 95% of the cells monitored were UMTS cells, only in one or two places along my drive test path did the mobile drop to GSM (for all 4 network operators) Kind regards, Martin

Hi Evert, now that is an interesting calculation, I never calculated it that way. 18k a year, that should very well pay for a fat pipe + installation costs + proper network management. Cheers, Martin

Hi Andy, yes, all of that is obviously very important as well. But without having site first you cant do those. And getting a site up and running in the first place takes longest and must be one of the most expensive things. So I assumed they would have fewer ones. Cheers, Martin

Yes, its the STRG = CTRL, of course. Sorry, lost in translation... :-)

Hi Alfred, good point! VM performance depends on the machine. On mine, which is not very high end, I saw it level off at around 20 Mbit/s over the passthrough USB, i.e. not good enough for performance testing beyond Release 6. Perhaps it can still be tweaked, it needs to be checked. No delay difference of packets though. Martin

Hi Stefan, Concerning heat, the X121e with the i3 processor gets warm but nothing out of the ordinary. Quite surprise me, I was expecting more heat than on my netbook but I dont see a big difference. Again a surprise that this i3 driven sub-notebook has now replaced my 17 inch Toshiba notebook with a Core Duo entierly as it works well even for DVD playback on a second screen. Not quite perfect I cant go full screen on the external full-hd screen, I get some ugly effects when the picture moves sideways but just sub-full screen works. Probably the Linux driver for the Intel graphics. As always its a compromise. Oh, laid off!? But thats independent from your work at IntoMobile? In any case, not good, hope you find something new soon! Cheers, Martin

Ah interesting, seems to be different from city to city. Here in Cologne, the dropped them in front of the houses.

Hi, In your scenario the phone does not respond to the paging and you would get a currently not reachable announcement or you would be forwarded to voicemail in case that has been set. Cheers, Martin

Hi Andrew, Thanks for that. Indeed my Android devices are running Gingerbread and Honeycomb. When I have a chance Ill have a look at if/how ICS has improved things. Cheers, Martin

Hi Christian, They say its a Dual-Standby device so it cant transmit on two chains simultaneously. There are devices out there that can transmit on two radios at the same time such as Verizons HTC Thunderbolt which does LTE and CDMA at the same time for voice and data. But I assume thats quite a bit more complicated than just having one transmitter change. So for 138 euros I wont complain. Just published part 2 which will give some more answers. Cheers, Martin

Hi David, thanks for the comment! On the WCDMA side I wouldnt discount RX diversity and type 3i receivers with active interference cancellation. The results are quite astounding. So I wouldnt bet all my horses on cell edge performance superiority of LTE, especially not when early non-optimized LTE networks compete with very fine tuned WCDMA networks :-) Kind regards, Martin

UPnP opens the ports as stated in the blog post. Otherwise, as you say, it would not work due to the NATing. Martin

Hi Stefan, ah, interesting, the FCC, I didnt think of them. You are right, they might have something to do with it in the US. But in Europe, an FCC like approval was abandoned already over 10 years ago. So while a type approval process might be in the way there its definitely not an obstacle over here. Cheers, Martin

Hi Christophe, interesting thought but then the number must fall very sharply now as DoCoMo supposedly switched of their 2G network in March this year. See here for details: http://mobilesociety.typepad.com/mobile_life/2009/11/ntt-docomo-to-switchoff-2g-in-2011.html One of the readers commented that since 2003, DoCoMo sold UEs were not dual mode anymore. So since the graphs dont say 3G base stations but just base stations there is of course the possibility that your are right. Cheers, Martin

Hi Michael, I wonder if you have more data and comparisons concerning this!? I am frequently traveling in both Europe and the US and quite frankly I dont see a big difference in the amount of smartphone use and smartphone penetration on either side of the Atlantic. Cheers, Martin

Hi Andy, No TCP/IP parameter optimization whatsoever, I just took the default from Ubuntu. I would expect that Windows Vista or 7s default stack settings would have given a similar performance as they also adapt the TCP window size. Yes, the sever is located in Germany so short RTDs. And latency was, as you say around the 60ms mark to that server. Cheers, Martin

120, of course :-)

Hi Bayani, no, unfortunately not. Kind regards, Martin

Hi Bayani, I didnt use special software. You can observe the state changes based on the LED on the device that changes color when the UE goes from DCH to FACH/IDLE and vice versa. The second thing you can use to observe state changes is the ping round trip time. Sub 100 ms indicate DCH state while 300 ms indicate that the device is in FACH state. Then you do some timing measurements to find out how long it takes the network to switch the UE from FACH to IDLE or PCH. Once you have that you can deduct when the mobile goes into that state. And from those observatons you can deduct, as in this case, if there is a problem with state changes. Martin

Hi Andy, very common ones here in Europe: An old Huawei E220 (3.6 MBit/s HSDPA only) and a Huawei E176 (HSDPA 7.2, HSUPA). Cheers, Martin