Samsung Galaxy S2

[Thaifever]

I bought a Samsung Galaxy S2 phone and since I was already using True, I got the True version. I understand they have AIS version as well? Is my phone somehow locked to true? I threw in a DTAC sim and didn't get a signal. Do I need to change the firmware or unlock the phone in order to use other sims? The main reason I ask is True 3G seems to be inactive for the past few days. I have two Android phones and both only seem to pick up GSM. Anyone else have problems with True 3G recently?

[pinar]

tested the Galaxy S2 in a shop, with a Dtac (850) and AIS (900) sim. The Model Number was both times GT-I9100T. I was told the AIS version just run 3G on the AIS network, the True Version run only on True. Bulls***, i was able to get an real 3G connection with my AIS on the True Version and with the DTAC sim a 3G on the AIS version. You get the latest Asian FW 2.3.3.

True just sucks nowadays, all our staff in the office complain about the speed, seems like true want to move everyone to their new brand.

Speedtest with True while lunch 1,5 and 0,7 MB on a iphone4, with S2, dtac and the Lite'ng Rom v6.1 (XXKH3) it was 5,5 und 2,9 MB

Lite'ning Rom v6.1:

http://forum.xda-developers.com/showthread.php?t=1095274

[Cheops]

I have Galaxy S 1 model, which was standard at 900MHz only for 3G (well and 2100MHz). I tried following hack in the service-menu and was able to enable the 850MHz option as well. Until now I didn't try a True SIM if it actually works, but I think it will. Since Samsungs radio's inside the Galaxy line just covers all and depending the region they will adjust the firmware a bit for the used radio's.

Check it:

HOW TO: Enable 850Mhz 3G Network Frequency on your Samsung i9000 Galaxy S

This is for the Galaxy S 1, so not sure how Sammy did for the Galaxy S 2, but it could be the same.

[lomatopo]

I have Galaxy S 1 model, which was standard at 900MHz only for 3G (well and 2100MHz). I tried following hack in the service-menu and was able to enable the 850MHz option as well. Until now I didn't try a True SIM if it actually works, but I think it will. Since Samsungs radio's inside the Galaxy line just covers all and depending the region they will adjust the firmware a bit for the used radio's.

Check it:

HOW TO: Enable 850Mhz 3G Network Frequency on your Samsung i9000 Galaxy S

This is for the Galaxy S 1, so not sure how Sammy did for the Galaxy S 2, but it could be the same.

It won't work.

The Samsung Galaxy S has a 900 Mhz PAM/SAW filter. The Samsung Captivate has a 850 Mhz PAM/SAW filter.

Yes, the service menus present the 850 and 900 Mhz options, and you can select them, but they will not work. A Samsung Galaxy S will support 900/1900/2100 Mhz 3G and a Samsung Captivate will support 850/1900/2100 Mhz 3G.

Many SGS2's (excl. Korea, Japan obviously) appear to have a quad (or maybe penta-band?) baseband IC (Intel X-626 Gold) which can support 850 and 900 Mhz 3G.

Not sure about the SGS2 variants in the U.S. (AT&T, T-Mo and Sprint). The AT&T version may be the same as int'l SGS2's, having to support 850 and 1900 Mhz 3G.

[Thaifever]

I'm gonna change to AIS or DTAC. I can't even contact True personnel for some answers. <deleted>.

[Cheops]

I have Galaxy S 1 model, which was standard at 900MHz only for 3G (well and 2100MHz). I tried following hack in the service-menu and was able to enable the 850MHz option as well. Until now I didn't try a True SIM if it actually works, but I think it will. Since Samsungs radio's inside the Galaxy line just covers all and depending the region they will adjust the firmware a bit for the used radio's.

Check it:

HOW TO: Enable 850Mhz 3G Network Frequency on your Samsung i9000 Galaxy S

This is for the Galaxy S 1, so not sure how Sammy did for the Galaxy S 2, but it could be the same.

It won't work.

The Samsung Galaxy S has a 900 Mhz PAM/SAW filter. The Samsung Captivate has a 850 Mhz PAM/SAW filter.

Yes, the service menus present the 850 and 900 Mhz options, and you can select them, but they will not work. A Samsung Galaxy S will support 900/1900/2100 Mhz 3G and a Samsung Captivate will support 850/1900/2100 Mhz 3G.

Many SGS2's (excl. Korea, Japan obviously) appear to have a quad (or maybe penta-band?) baseband IC (Intel X-626 Gold) which can support 850 and 900 Mhz 3G.

Not sure about the SGS2 variants in the U.S. (AT&T, T-Mo and Sprint). The AT&T version may be the same as int'l SGS2's, having to support 850 and 1900 Mhz 3G.

Thanks lomatopo for your comment. Seems that you have more knowledge than me, since I don't know what a PAM/SAW filter is, so I will take your word for it

[jybkk]

I'm gonna change to AIS or DTAC. I can't even contact True personnel for some answers. <deleted>.

I think you should go for AIS rather than DTAC now. The current situation is more favorable for AIS development, and chances are that their network (especially 3G) will develop faster.

[Thaifever]

Well, I read some other reviews here and decided to use DTAC. I had them before, but only switched to TRUE because I was under the impression they had the 3G market cornered well. I also read in another post my phone may need an upgrade on the modem itself in order to work with true. I do find that a bit comical in that Samsung sold me a "TRUE" version of the S2. But, the main reason I switched was to do with customer service. I tried on and off for a week to get a hold of someone in customer service who speaks Thai, or English, and nothing.

Yesterday I went to Central Lat Prao to visit the True shop and let me tell you...the shop is tiny and was jam packed full of people. I eyed it up for a half a second and walked 20 feet beside it to the DTAC shop who then set me with a working 3G sim in 5 minutes, and a better pre-paid package to boot.

Since then, or the first time, I have seen what the fuss is about. Once I got outside the mall, I tested speeds between 3 and 5 MB per second on the speedtest app. This is from a 49 baht sim. This is plenty for my needs. Wow! Ok, now what's the crack here? >>TRUE made me fork out 200 baht for a special "7.2 MB HI-SPEED NET SIM". <deleted>? That's gouging in my mind.

Anyway, happy to be back again with HAPPY

[SoFarAndNear]

It won't work.

The Samsung Galaxy S has a 900 Mhz PAM/SAW filter. The Samsung Captivate has a 850 Mhz PAM/SAW filter.

Yes, the service menus present the 850 and 900 Mhz options, and you can select them, but they will not work. A Samsung Galaxy S will support 900/1900/2100 Mhz 3G and a Samsung Captivate will support 850/1900/2100 Mhz 3G.

I know that it is possible to flash firmwares from other countries to the phones. I bought an Samsung Galaxy S (GT-I9000) from MBK and was able to flash an European version to it. But it looks like the new firmware that I have has also not natively activated the 850mhz. Do you know if it possible to bypass this filter by flashing a firmware which supports the 850mhz? I found some posts in some Thai Forums but I am don't understand what they are writing. I heard in Australia and New Zealand 850mhz is more common.

[SoFarAndNear]

.

[lomatopo]

Do you know if it possible to bypass this filter by flashing a firmware which supports the 850mhz? I found some posts in some Thai Forums but I am don't understand what they are writing. I heard in Australia and New Zealand 850mhz is more common.

It is NOT possible to somehow enable a Samsung Galaxy S to support 850 Mhz 3G. This model only supports 900/1900/2100 Mhz 3G as it has specific, unique hardware for 900 Mhz. There are some variants of the Samsung Galaxy S which do support 850 Mhz 3G, the AT&T Captivate is one such variant. And the Captivate can NOT support 900 Mhz 3G.