Radio Frequency... - myTouch 3G, Magic Android Development

If all the radio.img are the same or interchangable from phone to phone, what determines what frequency they are operating at???? The antenna module????
Is it possible all else being the same... to have a 32A board reprogramed to work on TMO frequency???

Related

wifi? on faraday omap 850 schematics

dev's can you guys check this link it says there that the omap 850 cpu has wifi,but what i would like to know is if in the faraday its bean lock or has htc them selfs removed the hardware it self from the cpu chipset??? if the case is that its lock is there a way to unlock the wifi hardware??
The necessary hardware for WiFi has been removed, it you open one up you'll see two empty BGAs underneath the LCD where the WiFi chips should have gone.
Phil
hmm ic,well that settles it no wifi for my faraday woot ^^

Radio in Cell Phone?

alright first off before i ask my question i think all of you should know. i am an extreme newb to cell phone hacking and moding so please excuse my arrogance 2nd thing i do most off my posts off my cell phone so please excuse the bad grammer and spelling. anyways as i have been reading in the forum people list the mods to their phones and i notice one listed radio? so could someone educate me on what a radio is i figure that it is what keeps you conected to the service provider but other than that i am clueless so when you mode it do you physically open the device and replace something and 2 what is the point of changing the radio do. so could an expert educate me and feel free to tell me everything you know rather than just answering my 2 main questions.
I guess thats its the radio you use to listen to music, news etc... Most phones nowadays come equipped with built-in radio function. I hope that helps. =)
im not too sure about the exact thing you are talking about
however thats what a buddy of mine working in a cell repair shop told
for the radio(the one that broadcast phone signal not the radio you listen to)
you know that in order to use a 3g phone in the US or elsewhere
[but the problem is mainly US cuz here we use special 3G band compared to the rest of the world] you need to get the good frequency
however most of the time manufacturers only design and produce different radio chip for different region if they really have to
cuz you know running those factories is not given to anyone
and why redesign a phone when you already have one
a phone is like a computer.. "change a part, gotta change the whole part" concept..
however a phone might not work in certain 3G frequencies not because the radio cant but because the manufacturer didnt pass the regulations in those regions and it happen that the phone can be 3G but its locked in the ROM
so you need to mod the ROM to make 3G radio work
like the omnia
some ppl argues that it might be dual-UMTS but the US 3G is locked in the ROM
because samsung didnt pass the FCC(Federal C??? C?? the agency that rules communication) at that time(when the first omnia shipped)
so they couldnt put US 3G
same thing for the touch diamond but it was GSM that needed to be rom-unlocked
d3thstalker said:
I guess thats its the radio you use to listen to music, news etc... Most phones nowadays come equipped with built-in radio function. I hope that helps. =)
Click to expand...
Click to collapse
Not the right kind of radio bud
vanilla_star_8 said:
im not too sure about the exact thing you are talking about
however thats what a buddy of mine working in a cell repair shop told
for the radio(the one that broadcast phone signal not the radio you listen to)
you know that in order to use a 3g phone in the US or elsewhere
[but the problem is mainly US cuz here we use special 3G band compared to the rest of the world] you need to get the good frequency
however most of the time manufacturers only design and produce different radio chip for different region if they really have to
cuz you know running those factories is not given to anyone
and why redesign a phone when you already have one
a phone is like a computer.. "change a part, gotta change the whole part" concept..
however a phone might not work in certain 3G frequencies not because the radio cant but because the manufacturer didnt pass the regulations in those regions and it happen that the phone can be 3G but its locked in the ROM
so you need to mod the ROM to make 3G radio work
like the omnia
some ppl argues that it might be dual-UMTS but the US 3G is locked in the ROM
because samsung didnt pass the FCC(Federal C??? C?? the agency that rules communication) at that time(when the first omnia shipped)
so they couldnt put US 3G
same thing for the touch diamond but it was GSM that needed to be rom-unlocked
Click to expand...
Click to collapse
This is what i understand about radios (the cell phone kind )
Your radio is what communicates with the tower and can affect how many "bars" you get. Not having the correct radio will also cause your phone
Camera not to work, to have a black screen, and/or to have no sound or intermittent sound.
The radio chip stores information, but you can change the information on that chip by "flashing a new radio."
This is just my own understanding so if i made a mistake don't be afraid to correct me
I believe the radio part of these devices is the information that tells the hardware in the phone how to act. What frequencies to use on the cell band, how the wifi antenna acts, how the bluetooth antenna acts, etc... Even how the GPS antenna works. Hence while in CDMA land my Titan needed a GPS enabled radio to make the gps work. There was a chip and antenna in there, but the radio excluded directions for the processor to interact with it.
My mind is simple, and this may be wrong but it is how I understand how the radio portion affects the phone.
Also, feel free to correct us if we are wrong!
Wow... Where.... wow.
Radio function
Radio is the whole function of the cell phone part of your tiny portable PCs your carrying around.
Its a
Duplex (transmits and receives separate carrier waves at the same time) ,Two-way, VHF and UHF, FM tranceiver in its purest form.
The cell towers are nothing more than ham radio pioneered "repeater" stations, connected to land phone lines. 20 years before the 1st commercial cell phone, HAM radio operators were setting up their own area "club" repeater stations, and networking them much like cell phone operators do now. The biggest rush of my young electronic life was carrying a kenwood TR-2500 FM handheld with me on my Yamaha YZ-80 out to the remote areas of our trails, and making a phone-patch call from the handheld thru the repeater and to a household phone. It felt like star trek man. I felt so high tech and up to date as a 15 year old carrying a radio my license didnt allow yet. LOL The funny part was everyone who was on frequency would get to hear your conversation too. Modern cell phones are the same thing only with collars and leashes.
So , back to the PDA with a two meter radio crammed tight agaist a computer with buttons that are too small ...
Thats really what you have.
Everything that a PDA is , outside of Radio [ a patch(voice) connect or a modem(data) connect] is just a small computer.
By the way, I raised the room temp tonite by leaving a Touch Pro turned on and Idling its data connection ...
Circuit... great explanation! But how do I know what Radio version my X1i needs?
In Smartphones and Pocket PCs, 'Radio' refers to the RIL. Radio Interface Layer. An API (Application Program Interface) that sits between Windows Mobile and the hardware driving the phone. An API is a published series of functions/methods that an application or operating system can call.
Ther is a patent for it at http://www.patentstorm.us/patents/6826762.html.
It is so that the transmitter/receiver sits at arms length from WM or its apps, i.e. you can't go POKE the phone's registers directly, you have to ask pretty please through the API.
The Radio part of the ROM is the version that this API is at, for your device.

[Q] Fuze bad reception tips? (Solved - HW issue fixed)

[Edit: See post # 7 for hardware fix that solved my problem]
I need help with improving calling reception on the used AT&T Fuze I bought for use on the TMobile USA network, specifically North-Eastern USA (NYC metro area).
I have SIM unlocked the phone (thanks to purchased unlocker from Olipro), I have flashed with several ROMs (starting with NRG's EnergyRom "photon" series), and I have tried various Radios and matching ril dlls. It surprises me just how bad reception is. In areas that my old T-Mobile Wing (a.k.a HTC Herald)gets almost full signal, the Fuze fluctuates from three "bars" down to none, with the signal being lost and reacquired constantly. I have tried "locking" the band to 850 and 1900 GSM (which is what Tmo USA uses) with little effect.
I'm at a lost. I have tried searching this forum, but several posts are related to AT&T network (understandably as it is an AT&T phone) and issues with TMobile UK reception (which is supposedly bad). For the most part, it looks like TMobile USA should have great reception in general in my area..... but I don't. I know my area has coverage by looking at other phones, just not my Fuze.
Can anyone from the NYC Metro area (mostly northern NY area) who has successfully connected the Fuze to Tmobile help me? What ROM and Radio combo worked best for you?
Plus, can anyone with experience tell me if it is possible that my phone has a hardware problem. Could there be something wrong with the antenna? How could I test this, and or fix this if it is hardware?
(Note: I am referring to regular GSM signal. I know that there is no 3G for me due to unsupported 1700 3G radio band.)
Thanks.
Nonpaq
Radios I have tried are:
Ralp 1.10.25.18
Ralp 1.14.25.35
BS 1.17.25.09
Quartz 1.11.25.01
X1 1.10.25.18
Each was tried with the default RIL in ROM and the version specific RIL (when available). All have been identical with poor GSM reception.
Has anyone been successful with using the FUZE on TMobile in northeastern US?
Another question: Does keeping a radio for longer period of time help improve the signal locking, as if the tower and phone need to "learn" about each other? I remember old non-smartphones used to have to have their list of available towers updated so that the phone could recognize newer, closer towers. I assume that this is no longer the case.
Plus: Fieldtest shows occasionally the GSM 850 band is used, but most of the time the band is listed as "PCS". Is that the GSM 1900 band? I believe that Tmobile mostly uses 1900 in this area as well as 850. Is it possible I am not seeing the 1900 band?
-nonpaq
I have the Fuze on T-mobile as well. I am in the SouthEast and have good luck with Radio 1.14.25.05. I've tried them all. This Radio I've used for almost 5 months now; good reception, good GPS, good batery. Try it, with matching rilphone ofcourse. good luck.
Well I loaded up Energy Titanium latest build (Nov 10) and had radio version 1.17.25.09 from before, and all of a sudden I was getting 3 to occasionally 4 "bars" in my home (previously I would get two "bars" max). It would occasionally drop and rescan for signal but not often. Outside had a solid lock on the signal.
I thought I finally found the perfect combo, but unfortunately when I got to work, indoors, 40 miles away from home, it was the same ol' story. Mostly no signal lock, with an occasional 1 bar signal.
Watching FieldTest data is interesting though. While scanning for signal, I can see the NCell info get data, which I understand are cell towers the phone "sees" but are not locked in. It fluctuates from 1 to 6 towers seen, down to none with the phone not moving. The receive strength reported for these towers varies from -106 dbm to -97 dbm, but does not lock on to the signal. (I occasionally get GPRS lock with zero bars). Can anyone explain this to me.
Plus, can any of these reception problems be related to using an AT&T phone on the T-Mobile system, preventing the towers from allowing a lock? I always thought that the SIM card's IMEI controlled access, but could tmobile somehow lock out unknown phone models?
tt1114 said:
I have the Fuze on T-mobile as well. I am in the SouthEast and have good luck with Radio 1.14.25.05. I've tried them all. This Radio I've used for almost 5 months now; good reception, good GPS, good battery. Try it, with matching rilphone ofcourse. good luck.
Click to expand...
Click to collapse
I flashed the Radio 1.14.25.05 and installed the matching RIL version and now I'm getting a lock of 1 "bar" where previously I did not. Fieldtest shows the same signal strengths as before for Neighboring Cell Towers [NCells] except now it is locking onto a signal of -105 dBm or better. (I even got 2 "bars" at -103 dBm ) According to the ARFCN field , it is now locking into the 1900 band (CNs in the 600s) where previously it would only lock into the 850 band (CNs in the 100s).
Looks good so far as I can actually get phone calls now!!! Thanks for the recommendation. (By the way... it looks like the signal gets better as time passes. By the time I finished this post, the phone is showing a steady 2 "bars").
My saga continues.....
My two bars at work were short lived. Signal is now back to 1 or no bars. I am going to experiment with some of the older radios.
Heres an interesting thing. I experimented with another persons AT&T SIM card and reception was great!! From the same location, AT&T gives "Full Signal" yet TMobile gives barely 1 bar and cannot hold onto the signal. Now I realize that the TMobile towers might be located further than the AT&T towers causing the difference in signal levels, but if not that, what else can cause one to be so much better than the other. (Keep in mind, my other TMobile phone, the HTC herald, gets great service, as does the other person's regular AT&T phone. So I know there is service here.)
I know the ROMs are not service specific, but are the radios optimized for particular services. Is there any radio that may be more generic, or optimized for the 850/1900 GSM band that TMobile USA uses?
I fixed my bad reception problems with my fuze on TMobile USA. It turns out that it was a hardware issue, the antenna was not making a good contact to the circuit board.
I opened my Fuze by removing the four screws under the back cover. Then use a flat plastic "stick" to separate the casing from the keyboard (careful, the back speaker is connected by a short wire from the circuit board to the back plate.) The GSM antenna is at the bottom (looks like black tape from the outside back). It connects to the circuit board by contact tabs that touch when the back plate is on. What I did was slightly lift these tab "fingers" so that they extended a little more. The theory is that when I reconnect the back plate they will press harder on the contacts on the other side.
After putting everything back together, I'm getting full service where previously I got only two bars.
If you have bad reception, and you are not afraid of voiding your warantee and cracking open your phone's case, you should try this simple fix. I recommend looking up the disassembly guide as there are several potential problems you need to be careful of. First, the back speaker wire can easily be broken. Second there is a main circuit board and a smaller daughter board which can separate. There are two connectors, a large one about the middle of the phone, and a small on on the side. Make sure both are connected (pressed together) before reassembling the phone case.
Let me know if this is useful for you. I can put together a step by step guide if you want. Just PM me.
where did you get the radio 1.14.25.05?
where can i find this radio with the matching RIL???
thank you im also having the same trouble with my htc fuze for t-mobile

[Q] Help me Label the antennas...

I have attached pic... I want to know what each terminal is for.. I am sure about B and D coz i tested them... Don't know about remaining... Can someone help?
A = ?
B = Wifi
C = ?
D = GSM Network
E = ?
Only answer if you are really damn sure... No guesses...
Hi,
I am interested in this as well.
I can confirm B.
My wifi disappeared,so I lifted the two connectors and it was restored.
EDIT:
I just checked my phone.
I haven't got an A
That 'A' is still controversial... It comes in T-MoUS Sensations... Not present in European and XE Sensation...
Some say it's 4G, but then i read that guys with T-Mob using XE Sensation backcover getting 4G signals without any problems.. So it's not 4G ..:-/
Anyone? A million people having Sensation don't know what those antenna are for?
Ha, well that explains what the mysterious bump is on the inside of my back cover - it's another thing that would have been painted yellow if my phone had been shipped to a different part of the world!
A person makes a pretty good aerial, so try taking the back off and touching each contact on the phone in turn with your finger to see which radio's signal comes back.
"A" is clearly for a radio which has no purpose in the UK, or perhaps for one which can share its aerial with another radio... Could it be a different frequency thing, like an optimised antenna for a different GSM band or even for CDMA if the Sensation has a version that supports it? Or it could still be for 4G; just because you read something somewhere doesn't mean it's true.
I can personally confirm that the extra antenna is not 4G. I bought a white XE cover and have noticed zero reception problems in WiFi, 2G/3G/4G, and GPS.
jjdoctor said:
I have attached pic... I want to know what each terminal is for.. I am sure about B and D coz i tested them... Don't know about remaining... Can someone help?
A = Diversity Antenna (RX Only)
B = WiFi & Bluetooth
C = GPS Receive
D = Cellular Network Transmit
E = Cellular Network Receive
Only answer if you are really damn sure... No guesses...
Click to expand...
Click to collapse
See this PDF attachment by me, it's from the FCC filing. All the antennas are labeled.
http://forum.xda-developers.com/attachment.php?attachmentid=763245&d=1319731287
It's from this thread: http://forum.xda-developers.com/showthread.php?p=18815345
~T.J.
EDIT: Forgot it was semi determined the photo is wrong and has GPS and diversity switched most likely.
Interesting... although I'm lacking the gps antenna but still have gps. What does 'diversity' antenna mean?
02CWRX said:
See this PDF attachment by me, it's from the FCC filing. All the antennas are labeled.
http://forum.xda-developers.com/attachment.php?attachmentid=763245&d=1319731287
It's from this thread: http://forum.xda-developers.com/showthread.php?p=18815345
~T.J.
Click to expand...
Click to collapse
just like tlloyd87 said, i m also lacking this antenna A in my back cover and i have GPS fully functional...
That D i agree is GSM network, but i can't say exactly if it's only one sided reception only coz i applied aluminum foil to only D and my network reception showed up and i dialed a number and got connected without any issues..
When i touched E alone, i had no reception at all..
I read that thread but it's not coinciding with facts... That PDF marks GPS wrong too...
One theory is that the photo from the filing actually shows the antennas switched (GPS for Diversity) meaning you still get GPS, but are missing the diversity antenna - IE - a Sensation 4G has diversity and GPS, a Sensation XE (and apparently some international phones) only have GPS.
I forgot about this when I posted, I have edited my above post. This has all been covered many times, you could search and read about it all.
tlloyd87 said:
Interesting... although I'm lacking the gps antenna but still have gps. What does 'diversity' antenna mean?
Click to expand...
Click to collapse
The diversity antenna was described as being a "booster antenna" to try and improve reception and supposedly isn't used at all times. People who have put different back covers on without it seem to report no loss in signal strength, so maybe it's not used at all?
~T.J.
Just looked it up on Wikipedia, apparently a Diversity antenna is to mitigate interference caused by the radio signal bouncing off obstacles between the transmitter and receiver. Several aerials receiving the same signal means at least one of them should get something usable. I believe 802.11n wireless uses this principle.
Perhaps a diversity antenna isn't necessary for correct operation, but can improve reception where fitted?
Correct. MIMO (multi in, multi out) technology is the same concept/same thing. No one is just sure how often it's used, or if it's used at all currently.
~T.J.

Antenna power?

So, just like increasing the voltage/frequency of processors, is that possible with the radio antenna of mobile devices? For example, you'd do whatever you need to do to "overclock" the antenna, and suddenly you have better reception, or now you have 4G.

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