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[Q] 3g 850 band

the O1 has 900 / 2100 3G band stock.. is it possible in any shape or form to add a band to it? for example the 850mhz band?? can any developer take a look into this? im already assuming its hardware related but for the many transformations the O1 has gone through im not ruling it out as impossible just yet.. please have a look into it thanks..

r3al_0g said:
the O1 has 900 / 2100 3G band stock.. is it possible in any shape or form to add a band to it? for example the 850mhz band?? can any developer take a look into this? im already assuming its hardware related but for the many transformations the O1 has gone through im not ruling it out as impossible just yet.. please have a look into it thanks..
Click to expand...
Click to collapse
Well it's impossible, as in totally. These bands are not like porting ICS over and i guess they may need a change in chipsets or whatever.

r3al_0g said:
the O1 has 900 / 2100 3G band stock.. is it possible in any shape or form to add a band to it? for example the 850mhz band?? can any developer take a look into this? im already assuming its hardware related but for the many transformations the O1 has gone through im not ruling it out as impossible just yet.. please have a look into it thanks..
Click to expand...
Click to collapse
2G Network:GSM 850 / 900 / 1800 / 1900
3G Network :HSDPA 900 / 2100
850mhz band is for 2g
U want 2g while u select wcdma only, is it that ?
Why dont u select gsm only if thats the case

Perhaps it ispossible, but you need to flash another radio image for it. Also, your radio must support that frquency.
Sent from my iPad using Tapatalk HD

rishabho1 said:
2G Network:GSM 850 / 900 / 1800 / 1900
3G Network :HSDPA 900 / 2100
850mhz band is for 2g
U want 2g while u select wcdma only, is it that ?
Why dont u select gsm only if thats the case
Click to expand...
Click to collapse
im on 2g.. the problem im facing is that the network im on the 3G band is 850 n the O1 doesnt support that band for 3g..

_Arjen_ said:
Perhaps it ispossible, but you need to flash another radio image for it. Also, your radio must support that frquency.
Sent from my iPad using Tapatalk HD
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Click to collapse
thats wat i was thinking.. for example: the old motorola l7 stock was GPRS n with sum modifications was about to use EDGE.. the codes for the OS r different but what seemed impossible in the beginning turned out different after trying..
as Cresqo said, it cud b hardware depended n therefore would be impossible.. i personally have no experiencing where Android OS modding is concerned thats y im asking for advice here where experienced ppl are..

Well, say our phone supports that band (which I guess it does), we need to hack the radio image. I have done it on Nokia phones before, but never looked into it for LG P500.

_Arjen_ said:
Well, say our phone supports that band (which I guess it does), we need to hack the radio image. I have done it on Nokia phones before, but never looked into it for LG P500.
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Click to collapse
well at least we know it has been done b4 so its not impossible.. wud u take a look into it on ur time plz.. thanks

I was looking into this not too long ago. See the third post here: http://forum.xda-developers.com/showthread.php?p=26608544
P500 uses WCDMA band 8, which is 880MHz - 915MHz. This is determined by hardware filters unfortunately.
Sent from my LG-P500 using XDA

curious_one said:
I was looking into this not too long ago. See the third post here: http://forum.xda-developers.com/showthread.php?p=26608544
P500 uses WCDMA band 8, which is 880MHz - 915MHz. This is determined by hardware filters unfortunately.
Sent from my LG-P500 using XDA
Click to expand...
Click to collapse
thanks for the info.. i guess im stuck using 2g on my beloved O1

yeah, I'm in the same boat
Sent from my LG-P500 using XDA

i saw the at&t version of the P500 on the same network im on with 3G
i dnt think its impossible.. (i got mine from t-mobile)

jiayu g2

Purchased a Jiayu g2 to play with so far the phone is very nice. It is suppose to work with 850/900/1900/2100mhz wcdma however I cannot get it to work on 3g with att I only get edge and have tried just about every apn setting I can. Does anyone else in the US have this phone working on 3g? I have it rooted. Funny never thought I would say this but it is a very nice phone.

eaa628 said:
Purchased a Jiayu g2 to play with so far the phone is very nice. It is suppose to work with 850/900/1900/2100mhz wcdma however I cannot get it to work on 3g with att I only get edge and have tried just about every apn setting I can. Does anyone else in the US have this phone working on 3g? I have it rooted. Funny never thought I would say this but it is a very nice phone.
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Click to collapse
A lot of these Chinese phones state they're quadband GSM, but only have 2100 for 3G. Correct me if I am wrong.
Also, do you accidentally have GSM Only set?
Sent from my iPad using Tapatalk HD

KayxGee1 said:
A lot of these Chinese phones state they're quadband GSM, but only have 2100 for 3G. Correct me if I am wrong.
Also, do you accidentally have GSM Only set?
Sent from my iPad using Tapatalk HD
Click to expand...
Click to collapse
here is the link for google translate.
http://translate.google.com/translate?hl=en&sl=zh-CN&tl=en&u=http://www.ejiayu.com/Product-5.html
this is the manufactures website and in the product parameters tab it shows 850/900/1900/2100 wcdma 3g and even in the engineermode menu it has them listed. i only paid 160 for it but to be honest it is a real nice phone and i was completely shocked at how well it was constructed. i even have it rooted. if there is anyone else out there that has this phone in the US or anywhere i would be interested to find out what bands you are on.

Take a look at the specshere
It shows 2100MHz for 3G
Don't be fooled by Engineering mode. It may show the options for specific MHz, but if the phone doesn't support it then the options pointless and misleading.
Sent from my iPad using Tapatalk HD

KayxGee1 said:
Take a look at the specshere
It shows 2100MHz for 3G
Don't be fooled by Engineering mode. It may show the options for specific MHz, but if the phone doesn't support it then the options pointless and misleading.
Sent from my iPad using Tapatalk HD
Click to expand...
Click to collapse
i hear what you are saying. but the fact that the manufacture website shows the bands. i understand that the selling sites are all diff some show 2100 some show 850/2100. but for 160 it was worth a shot.

So no one else in north America has this phone?

Hi,
I have heard that MTK6575 SoC does support 3G on 850MHz/1900MHz. Two things might prevent it from working.
1. Your cellular provider maynot be providing 3G on both 850 and 1900 where you live. It could just be on 1900MHz where you live. Could you go to some other part of the city and test it?
2. I have read that the antennae required for 850/1900MHz is different from 2100MHz. So, even if the SoC supports it, the signal strength is not strong enough to make it work.
I would be very interested in your test results since I am thinking of buying one.

KayxGee1 said:
A lot of these Chinese phones state they're quadband GSM, but only have 2100 for 3G. Correct me if I am wrong.
Also, do you accidentally have GSM Only set?
Sent from my iPad using Tapatalk HD
Click to expand...
Click to collapse
Because China Unicom 3G is @ WCDMA 2100MHz.
Sent from my GT-S5570 using xda premium

eaa628 said:
Purchased a Jiayu g2 to play with so far the phone is very nice. It is suppose to work with 850/900/1900/2100mhz wcdma however I cannot get it to work on 3g with att I only get edge and have tried just about every apn setting I can. Does anyone else in the US have this phone working on 3g? I have it rooted. Funny never thought I would say this but it is a very nice phone.
Click to expand...
Click to collapse
Hi! Did you insert your 3G SIM on the SIM 1 slot? It is the only SIM slot capable of 3G (WCDMA). There are two slots in Jiayu G2 and only SIM 1 will work with 3G. SIM 2 is for GSM only.

toffzter said:
Hi! Did you insert your 3G SIM on the SIM 1 slot? It is the only SIM slot capable of 3G (WCDMA). There are two slots in Jiayu G2 and only SIM 1 will work with 3G. SIM 2 is for GSM only.
Click to expand...
Click to collapse
yes i did. i have even tried to get help from Ejiayu.com and no one replies. the spec on the their website show is is 850/900/1900/2100 mhz wdma and it shows in the engineering menu as well but i think it is a lie i can not get it to work at all in 3g. My sim works fine in my Pantech Burst 4g LTE. i have not given u completely but i need someone who has an in depth knowledge of this phone to help

3g access
eaa628 said:
Purchased a Jiayu g2 to play with so far the phone is very nice. It is suppose to work with 850/900/1900/2100mhz wcdma however I cannot get it to work on 3g with att I only get edge and have tried just about every apn setting I can. Does anyone else in the US have this phone working on 3g? I have it rooted. Funny never thought I would say this but it is a very nice phone.
Click to expand...
Click to collapse
u might try and see what the apn setting is
u might have to input the correct apn for your carrier

Possible to unlock b20 800mhz mi4c ?

Hello I'm French and in my country the carrier use the B1 B7 and B20 to connect to network.
But all the xiaomi not use the B20 radion
I see it's possible to unlock B20 for smartphone use Qualcom soc ?
I don't know if is possible to unlock the B20 for the Xiaomi Mi4c ? It use a Qualcom 808 soc.
Please help me for use the B20 in the Xiaomi Mi4c

ggkameleon said:
Hello I'm French and in my country the carrier use the B1 B7 and B20 to connect to network.
But all the xiaomi not use the B20 radion
I see it's possible to unlock B20 for smartphone use Qualcom soc ?
I don't know if is possible to unlock the B20 for the Xiaomi Mi4c ? It use a Qualcom 808 soc.
Please help me for use the B20 in the Xiaomi Mi4c
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Click to collapse
Unfortunately you can't unlock band 20 at the moment, in fact you might not ever be able to unlock the band. So if it's crucial for you to have band 20, buy a different phone.
However, it's a really nice phone, if if you don't necessarily need the specific band, then this phone is a good buy I believe.

ok thank's a lot

@ggkameleon,
I don't have this phone (yet ) But, my Telco uses Band 20 too.
What I intend to do is use my sim for phone calls/TXT's and get a 'Pay As You Go' LTE sim for Net access.

If you see the most good chines provider don't use B20 Mezu Xiaomi Lenovo why ? And other use it but it's not the more good smartphone or huawei use it but the price are expensive. When you see the last Xiaomi Redmi 3 Redmi note 3 and now MI5 very good smartphone and not expensive.

Hi din't know what is it a 'pay as you go' ?
But if your telco use b20 you can't have 4g lte in b20 ! But if use with b20 the band b7 or b3 the phone connect to b3 or b7 if ist possible or connect to wcdma in 3g network !
But i can't know why meizu pro 5 use the same soc exynos than galaxy s6 and the galaxy s6 work in b20 ! It's not possible to unlock b20 in meizu?

ggkameleon said:
Hi din't know what is it a 'pay as you go' ?
But if your telco use b20 you can't have 4g lte in b20 ! But if use with b20 the band b7 or b3 the phone connect to b3 or b7 if ist possible or connect to wcdma in 3g network !
But i can't know why meizu pro 5 use the same soc exynos than galaxy s6 and the galaxy s6 work in b20 ! It's not possible to unlock b20 in meizu?
Click to expand...
Click to collapse
He meant he'll use a second, prepaid sim to get LTE from another provider who uses a different band. Although it's been said that using the dual sim function on this phone reduces battery life quite a bit.
Yes, if you don't have the correct 4G bands, but do have the 3G or 2G bands, your phone will be fully functional, just not have the best speed possible.
It's not just a matter of having the same soc, it's a combination of soc, radio and firmware. In some phones a workaround can be found to unlock the radio, others not.

Logic_ said:
He meant he'll use a second, prepaid sim to get LTE from another provider who uses a different band. Although it's been said that using the dual sim function on this phone reduces battery life quite a bit.
Yes, if you don't have the correct 4G bands, but do have the 3G or 2G bands, your phone will be fully functional, just not have the best speed possible.
It's not just a matter of having the same soc, it's a combination of soc, radio and firmware. In some phones a workaround can be found to unlock the radio, others not.
Click to expand...
Click to collapse
Ah ! Ok but if they are a provider don't use B20 go it ! Don't use two provider ? Ok it's not possible to unlock.
Me in my country (France) They are 4 provider Free use 2600 for 4g, but it's a new provider and they are not many radio in 4g and even less 3g I test it's not possible. Bouygues use for 4g 1800 2600 and a little 800 it's the best for chinese smartphones but where I leave there are not radio Orange use for 4g 800 2600 and in radio there are two band in city but in campaign only 800 Sfr use 800 2600 and use a lot of 800 and it's actually my provider. I speak with users of chinese phone the best are Bouygues or Orange because the one don't use many 800 and the second if don't possible to use 800 the phone go to H+ (wdcma 900) and the speed of 4g 800 it's the almost the same of H+ wcdma 900 !?
If I buy a Xiaomi or Meizu I do change my provider but the smartphone do use the 3G Wdcma 900 ! I believe do use it.
The problem now it's Xiaomi block the boot loader of the new phones ? I see the new Redmi note 3 Pro it's a more good quality but It's more complicated to change language and don't use B20 ! I'm disappointed.... I stay to see what Xiaomi make for international customers.

"He meant he'll use a second, prepaid sim to get LTE from another provider who uses a different band. Although it's been said that using the dual sim function on this phone reduces battery life quite a bit.
Yes, if you don't have the correct 4G bands, but do have the 3G or 2G bands, your phone will be fully functional, just not have the best speed possible.
It's not just a matter of having the same soc, it's a combination of soc, radio and firmware. In some phones a workaround can be found to unlock the radio, others not."
Ok i understand
Yes it's not a good idea to use 2 different provider one don't use b20 and one use it !
Because if you have a provider don't use b20 go for this provider Because you paid 2 provider ! It's just if you are in contract you can make this option but it's more expensive.
In France all provider use b20 ! Only one don't use but there are not enought radio.
Thank you for your message I understand it's to complicated to unlock band and it's possible to use only in 3g.

Yes, too complicated or simply not possible with the hardware. Whatever the case, 3G can be more than sufficient.. I have never done anything with my phone that required more speed than 3G.
However, the phone does have a lot of other LTE bands, be sure to double check if there's not one that matches, it was the case for me.
1(2100), 3(1800), 7(2600), 38(2600), 39(1900), 40(2300), 41(2500)
https://en.wikipedia.org/wiki/List_of_LTE_networks_in_Europe according to this, there should be enough in france that match to provide normal LTE operation.

Free Mobile is fine for Mi4c you know
I have LTE in outdoor in all Paris (indoor i'm always on wifi)

Thank you for your support and link
Actually my provider are Sfr (because I have a promotion for one year 10€ calls/sms unlimited ans 20go of data) and I do not want to break this wonderful contract
This provider use fifty/fifty FDD B20 800mhz/B7 2600mhz and UMTS B8 900mhz/B1 2100mhz
That good for Xiaomi Meizu FDD-LTD except FDD B20 800mhz
But there are a new problem with Chinese smartphones the Boatloder are lock now
I use Apple phones after Samsung with 3gs 4s and 5s but now the price of their phones are to much and not as high as the difference of Use Android phones ! It's stupid now to buy a smartphone than 800/1000$ it's not possible to my heart and my wife said go out of home if you buy it !!! Paid us a travel and buy another phones. she's right you know.
I like Xiaomi phones and I stay for the mi5......

jonasb_dk said:
Unfortunately you can't unlock band 20 at the moment, in fact you might not ever be able to unlock the band. So if it's crucial for you to have band 20, buy a different phone.
However, it's a really nice phone, if if you don't necessarily need the specific band, then this phone is a good buy I believe.
Click to expand...
Click to collapse
Wat about other bands ?

i used also my Mi4c with 2 SIM cards (one private with Free operator and the second one with SFR for pro usage). No real problem with 800mhz band used by the two operators.

Ok thank you

iwashere43 said:
i used also my Mi4c with 2 SIM cards (one private with Free operator and the second one with SFR for pro usage). No real problem with 800mhz band used by the two operators.
Click to expand...
Click to collapse
Did you unlock any bands on it ?

cy-rock said:
Did you unlock any bands on it ?
Click to expand...
Click to collapse
The problem will be in a zone where the SFR antenna will deliver 4G only on the unsupported band, you will have only 3G.
That'all. So, it's up tio you to test in the main zone you are, what bands are used by SFR.

Kéno40 said:
The problem will be in a zone where the SFR antenna will deliver 4G only on the unsupported band, you will have only 3G.
That'all. So, it's up tio you to test in the main zone you are, what bands are used by SFR.
Click to expand...
Click to collapse
I know which bands i need or use
...but i tried with qxm and qps to unlock bands on the mi4c but i was unable too !
so i was wondering if anyone else with this device was succesful !

Not possible. Maybe never...
http://forum.xda-developers.com/mi-4c/general/unlocking-lte-bands-t3215763
Sorry, I let the link for the others, but I've seen you've written something at the end....
You can try to contact him for expertise!
http://forum.xda-developers.com/showpost.php?p=56577252&postcount=455

Kéno40 said:
Not possible. Maybe never...
http://forum.xda-developers.com/mi-4c/general/unlocking-lte-bands-t3215763
Sorry, I let the link for the others, but I've seen you've written something at the end....
You can try to contact him for expertise!
http://forum.xda-developers.com/showpost.php?p=56577252&postcount=455
Click to expand...
Click to collapse
Yeah i read all that ...i was hopiing
thx tho....i can still use band 7 here LTE is doing great ...band 4 would be nice for full coverage especially inside building and metro ...

Enable UMTS 900 on TMO NOTE 5

Hi Guys, I recently bough a TMO note 5, previously I had a Sprint note 5 and I used it overseas and worked fine on UMTS 900.
I did not know that TMO note 5 has not access to UMTS 900 as the Sprint one had... is there any way I can flash a modem so the TMO note 5 can recognize UMTS 900 or is it hardware based? :crying:
I was reading that all version have identical Hardware, dont know it flashing an alternate rom or a modem file might enable umts 900 or if I can enable it via service mode (Don't know the code to type and access service mode :crying
Regards.

linkultima said:
Hi Guys, I recently bough a TMO note 5, previously I had a Sprint note 5 and I used it overseas and worked fine on UMTS 900.
I did not know that TMO note 5 has not access to UMTS 900 as the Sprint one had... is there any way I can flash a modem so the TMO note 5 can recognize UMTS 900 or is it hardware based? :crying:
I was reading that all version have identical Hardware, dont know it flashing an alternate rom or a modem file might enable umts 900 or if I can enable it via service mode (Don't know the code to type and access service mode :crying
Regards.
Click to expand...
Click to collapse
Dial *#2263# and profit
Sent from my SM-N930F using Tapatalk

Rx8Driver said:
Dial *#2263# and profit
Sent from my SM-N930F using Tapatalk
Click to expand...
Click to collapse
Thanx!!! sadly It does not show 900 band So I guess it is hardware related.
Thank you for your support!!!

linkultima said:
Thanx!!! sadly It does not show 900 band So I guess it is hardware related.
Thank you for your support!!!
Click to expand...
Click to collapse
Which band number is 900mhz?
Sent from my SM-N930F using Tapatalk

Rx8Driver said:
Which band number is 900mhz?
Sent from my SM-N930F using Tapatalk
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Click to collapse
Hi, I don'd understand what you mean by which band number is 900mhz ?
All I see are 850,1900,2100, 900mhz is supported by sprint's note 5, assuming they share the same HW with tmo note 5, I thought of enabling 900mhz somehow but using the code you gave me I dont have 900mhz listed, maybe flashing another modem ?

Well you need to look closely... you need the 900mhz WCDMA band... which would be referred to as "WCSMA Band xx", for instance here on T-Mobile, LTE band 12 is the 700mhz band that has good building penetration...
Sent from my SM-N930F using Tapatalk
---------- Post added at 02:22 PM ---------- Previous post was at 02:19 PM ----------
Under the menu you'll want to see that WCDMA is included in the list of bands, for instance, "LTE,GSM,UMTS,WCDMA,TDS" ......
Sent from my SM-N930F using Tapatalk

WCDMA Band 8 support in my phone

Hello,
If my phone supports 2G's GSM 900 isn't it supposed to support also 3G's WCDMA 900 ?

yoelian said:
Hello,
If my phone supports 2G's GSM 900 isn't it supposed to support also 3G's WCDMA 900 ?
Click to expand...
Click to collapse
Maybe, maybe not. You didn't say what device you have or what network your device is activated on, that can make a difference.
Sent from my LGL84VL using Tapatalk

Droidriven said:
Maybe, maybe not. You didn't say what device you have or what network your device is activated on, that can make a difference.
Click to expand...
Click to collapse
You're right, it's a LG (AT&T) Phoenix 2 K371 and from what i've read at Qualcomm's site i think i understood that it's modem supports it. I mean at least the antenna for the 900MHz is the same for GSM and WCDMA?
Thanks