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If I understood right at least some DVPs have radios capable of using both T-Mobile US's 3G network and European 3G networks. Has anyone tried this? Are we sure that all DVPs have the same radios? Or do the European ones have the US frequencies disabled or something?
Thanks in advance for any info,
Tom
The US ones have AWS for TMOUS, and European 900/2100.
Whether they will actually provision correctly and be usable w/ 3G services in non-US locales is anyone's guess. The US DVP has only just recently been unlockable and I don't think we have had any reports of actual int'l roaming success yet.
I think its been mentioned in the unlocking thread that people have used it in Europe and from the listing of the DVP I've seen the specs indicate its has the exact frequencies as the US one. I would expect it to work, unless Dell has done something really screwy (but thats not impossible) but hopefully someone can confirm for sure.
People are claiming that European DVPs have AWS 3G support? I don't think so.
Although it is conceivable that it's there and simply unadvertised, I believe non-US DVPs have 900/2100 *only*.
US DVPs have 900/2100 *and* AWS.
tai4de2 said:
People are claiming that European DVPs have AWS 3G support? I don't think so.
Although it is conceivable that it's there and simply unadvertised, I believe non-US DVPs have 900/2100 *only*.
US DVPs have 900/2100 *and* AWS.
Click to expand...
Click to collapse
Actually I was referring to people with US handsets being used in Europe, not the other way round. And its possible the Euro version is hte same as the US one, looking at a video of a DVP released in India it shows the same frequencies as the US one, and Clove also lists the same 3G frequencies so I would lean towards all DVP's bring usable in Europe and the US.
With today's big news, what's the point?
Once AT&T shuts off AWS UMTS in a year or so we are all gonna be left with paperweights anyway.
tai4de2 said:
With today's big news, what's the point?
Once AT&T shuts off AWS UMTS in a year or so we are all gonna be left with paperweights anyway.
Click to expand...
Click to collapse
NAY, I SAY THEE NAY!!!!!!!! Could be right though, but I was planning on ditching the DVP for a penta band Nokia so I guess I'll be ok - save for being on at&t!
3G works here
They are saying it will take "several years" to transition T-Mobile users. Lets hope the regulators see sense and block it in any case...
So I have a European DVP now. Anyone know of an app that will tell me the radio frequencies it supports? The System Info one doesn't seem to.
It supports 900 and 2100.
How did you find that out? The box says UMTS 2100/1700/900.
The European box says the phone inside supports 1700?
my US T-mobile DVP (unlocked) works fine on tmobile Germany and I get about 3000k download 2500k upload. I am in a fairly bad region for network speeds. But I have hit upwards of 7000k download in some bigger cities.
tai4de2 said:
The European box says the phone inside supports 1700?
Click to expand...
Click to collapse
Yes.......
So i am considering buying this phone, but I have only 1 concern about lte on this website: http://www.gearbest.com/cell-phones/pp_230088.html it says that 4f bands are only:FDD-LTE 1800/2100/2600MHz, so will it work in Canada?? I checked http://maps.mobileworldlive.com/ and It only compatable with 2100, no 1700 is it fine if I only have 1?
Help please!!!
Bump!!
Bump!
Bump!
Any canadians??
I have ordered the international version and I did some research and basically the bands are dependant on what your network is broadcasting on. If you google what frequency/band your provider is broadcasting on then cross-reference it to the ones supported then you'll know if it works.
- Peace BreadC
Carriers use more than 1 band cause the don't have full coverage with only 1 so sometimes you should have LTE coverage and sometimes don't , I'm in the same dilemma the phone is really good but not having the LTE bands used in US is a deal breaker, I'm waiting to October cause its supposed to be officially released to the US and maybe they'll release a revised version with the LTE bands used here.
Breadcrust said:
I have ordered the international version and I did some research and basically the bands are dependant on what your network is broadcasting on. If you google what frequency/band your provider is broadcasting on then cross-reference it to the ones supported then you'll know if it works.
- Peace BreadC
Click to expand...
Click to collapse
Hey buddy, does the phone work with 3 and EE's 4G? I dont think that this phone has band 20 support.
Kamran9558 said:
Hey buddy, does the phone work with 3 and EE's 4G? I dont think that this phone has band 20 support.
Click to expand...
Click to collapse
I bloody well hope so! I changed from o2 to Three thinking it had support. I think it supports their bands.
Breadcrust said:
I bloody well hope so! I changed from o2 to Three thinking it had support. I think it supports their bands.
Click to expand...
Click to collapse
Can you check it? Three use 1800 band and have launched their 800 band recently(not wide spread at the moment) which would improve their indoor 4G coverage, EE already use 800/1800 bands,
I think you can probably check in the service menu.
Mine hasn't come yet, I got scammed on zukphone.cc by a PayPal account called [email protected]. PayPal are investigating but my Dad has a OnePlus One and he has 4G on Three so I can only assume it will work.
Any Canadians bought it???
FWIW, I just checked bands/frequencies and as far as I understood even the international version of the ZUK Z1 (weird that their english web-site is at zuk.hk and the chinese web-site is at zuk.com) won't work on Telus/Koodo.
stangri said:
FWIW, I just checked bands/frequencies and as far as I understood even the international version of the ZUK Z1 (weird that their english web-site is at zuk.hk and the chinese web-site is at zuk.com) won't work on Telus/Koodo.
Click to expand...
Click to collapse
Afaik, the "international" version of the phone is identical to "chinese" version. Only difference is OS preinstalled (Cyanogen OS for international). So basically, it should work in EU, Asia, Australia etc, but not in the US or Canada (of course depending what bands you need).
Breadcrust said:
I bloody well hope so! I changed from o2 to Three thinking it had support. I think it supports their bands.
Click to expand...
Click to collapse
It does.
Check on willmyphonework.net
mcgangsta said:
Afaik, the "international" version of the phone is identical to "chinese" version. Only difference is OS preinstalled (Cyanogen OS for international). So basically, it should work in EU, Asia, Australia etc, but not in the US or Canada (of course depending what bands you need).
Click to expand...
Click to collapse
Oh, I thought I've read somewhere that the International version will sacrifice some of the TDD-LTE bands for more of the FDD-LTE bands, so besides the OS difference I also expected different bands support.
Anyways, the specific band for the network I'm using doesn't seem to be supported. And it's one of the top 3 providers in Canada.
Bump to see if anyone has got it working in canada and with which company.
stangri said:
Oh, I thought I've read somewhere that the International version will sacrifice some of the TDD-LTE bands for more of the FDD-LTE bands, so besides the OS difference I also expected different bands support.
Anyways, the specific band for the network I'm using doesn't seem to be supported. And it's one of the top 3 providers in Canada.
Click to expand...
Click to collapse
Are you with Telus/Koodo? It seems like it will work with Bell/Virgin and Rogers/Fido.
itskearny said:
Are you with Telus/Koodo? It seems like it will work with Bell/Virgin and Rogers/Fido.
Click to expand...
Click to collapse
stangri said:
FWIW, I just checked bands/frequencies and as far as I understood even the international version of the ZUK Z1 (...) won't work on Telus/Koodo.
Click to expand...
Click to collapse
Seriously dude, it's on the same page even.
stangri said:
FWIW, I just checked bands/frequencies and as far as I understood even the international version of the ZUK Z1 (weird that their english web-site is at zuk.hk and the chinese web-site is at zuk.com) won't work on Telus/Koodo.
Click to expand...
Click to collapse
Why won't it work on Telus/Koodo? I checked the bands and it has the 3g bands that work on Telus/Koodo.
Hello!
I've bought a Chinese version of OP2 and it seems to be doesn't have Band 20 LTE support (800 MHz). :crying:
And I was wondering if it's possible to unlock the band like for OPO?
That's not known yet, but I've got my doubts.
I was scared as you after see that I bought the chinese version which doesn't have the 800mhz; but I checked on this site if my phone will work on the LTE of my carrier:
http://www.willmyphonework.net/
Fortunately it works. The real problem is that the chinese version, having only one IMEI, doesn't allow the use of dual sim outside of the China.
Hope your LTE works!
Kito92 said:
I was scared as you after see that I bought the chinese version which doesn't have the 800mhz; but I checked on this site if my phone will work on the LTE of my carrier:
http://www.willmyphonework.net/
Fortunately it works. The real problem is that the chinese version, having only one IMEI, doesn't allow the use of dual sim outside of the China.
Hope your LTE works!
Click to expand...
Click to collapse
That's not true regarding the dual Sim, it works in standby mode and can be used when primary Sim is not in use (I know this as I have the Chinese version of the handset and I am using 2 Sim cards).
Swatto86 said:
That's not true regarding the dual Sim, it works in standby mode and can be used when primary Sim is not in use (I know this as I have the Chinese version of the handset and I am using 2 Sim cards).
Click to expand...
Click to collapse
Yeah can confirm this is the same in Australia.
Yes I have LTE, I've checked before buying, but It still one of the Bands I would like to have (it works well inside the buildings).
And yes, bouth SIMs work in dual standby mode.
Has anyone tried using the same guide used in OnePlus One?
Sent from my ONE A2001 using Tapatalk
yellowsn0w said:
Has anyone tried using the same guide used in OnePlus One?
Sent from my ONE A2001 using Tapatalk
Click to expand...
Click to collapse
My phone's going to be delivered tomorrow and I'm going to try it. I'll report back and letb you know.
@josh598208 so how did it go lol
yellowsn0w said:
@josh598208 so how did it go lol
Click to expand...
Click to collapse
I am also interested in knowing that
xfox said:
I am also interested in knowing that
Click to expand...
Click to collapse
me too! I've also bought a chinese version of OP2 and I wanted to unlock band 20.
Also subscribing to the thread! I'm going another way: I have the American version and want to use it in Europe (Poland in particular, so I need band 3).
Has anyone tried the unlocking guides on OP2? Is it only a software issue or do the modems actually differ?
xfox said:
I am also interested in knowing that
Click to expand...
Click to collapse
I haven't gotten them unlocked. I tried the opo method, denied. I'm using it on hspa+ and really can't tell any difference from LTE. Just my opinion.
quezak said:
Also subscribing to the thread! I'm going another way: I have the American version and want to use it in Europe (Poland in particular, so I need band 3).
Has anyone tried the unlocking guides on OP2? Is it only a software issue or do the modems actually differ?
Click to expand...
Click to collapse
Hello quezak,
I am facing the similar issue. My order is not arrived yet. Is it possible to load EU based ROM on US base OP2?
R//
me too need the band 3 work on my USA version
xfox said:
I am also interested in knowing that
Click to expand...
Click to collapse
I was in hurry cause there was 2 hours left on my invite
I bought the us version then after I receive it I note that I need the global version and they send the us one
so do you think there well be a solution or i should return it
HELP ME PLEAS
easijav said:
Hello quezak,
I am facing the similar issue. My order is not arrived yet. Is it possible to load EU based ROM on US base OP2?
R//
Click to expand...
Click to collapse
The problem is modem/Hardware level changing rom won't work
Sent from my ONE A2005 using Tapatalk
Certainly is important.
xfox said:
I am also interested in knowing that
Click to expand...
Click to collapse
I like use the band 800 in México LTE.
One person respond my question and the process to ONO no function.
Do you have information about other team/member working in this topic?
I followed the same procedure as oneplus two, but stuck on drivers installation.
Would be glad to have a solution on this.
I really need this I have messed up... I had to use a post forwarding service so I found a US one and I live in norway and got the US model.. I have asked if I can trade it for a EU one but they can't because of their policies.. Anyone know what band I need for it to work on LTE in Norway?
wackyleaks said:
I really need this I have messed up... I had to use a post forwarding service so I found a US one and I live in norway and got the US model.. I have asked if I can trade it for a EU one but they can't because of their policies.. Anyone know what band I need for it to work on LTE in Norway?
Click to expand...
Click to collapse
I think you can find something interesting reading information below:
With the OnePlus 2, we’ve taken some extra steps to ensure that our device works flawlessly in all the markets we support. A crucial component (no pun intended) is bands support. As you may be aware, LTE bands across the world differ significantly for various reasons (let’s talk about why that is some other time) and certain hardware restrictions make it so that you can only support so many bands in one device.
Thus, there is a trade-off between having all the bands and manufacturing complexity - the more bands you want to support, the more region-specific SKUs you have to create. We opted to make two different versions for two different regions - one EU/India, and one that we call North America. These are both OnePlus Global phones; they ship with Oxygen OS and the proper band support for your region. Besides those, there’s also the Chinese version that ships with Hydrogen OS and Chinese LTE support - this one is not available on oneplus.net (and is almost certainly the version you will get if you buy from anywhere else).
Here’s a breakdown of the differences (for EU/NA, bands in bold only available on that version):
Note that compatibility here refers to LTE, the fastest network currently available. The slower 2G/3G GSM frequencies (below referred to as GSM and WCDMA) are less fragmented and you should be able to get data almost worldwide with the included 2&3G bands regardless of the version. Use http://www.willmyphonework.net/ for easy reference.
EU/Asia
GSM: 850, 900, 1800, 1900MHz
WCDMA: Bands 1/2/5/8
FDD-LTE: Bands 1/3/5/7/8/20
TDD-LTE: Bands 38/40/41
3 and 20 are used almost all over Europe, but not at all in North America. Band 8, although available in both versions, is used in Europe and India but is seeing increasing adoption worldwide.
North America
GSM: 850, 900, 1800, 1900MHz
WCDMA: Bands 1/2/4/5/8
FDD-LTE: Bands 1/2/4/5/7/8/12/17
For NA, the removal of bands 3 & 20 allows us to add all the GSM bands you’ll need.
China
GSM: 850, 900, 1800, 1900MHz
WCDMA: 1/2/5/8
TD-SCDMA: 34/39
TDD-LTE: 38/39/40/41
FDD-LTE: 1/3/7
The Chinese version will have very limited 4G compatibility in Europe and North America. More importantly, it only has one IMEI meaning you will not have dual-SIM capability outside of China. If you like having dual SIMs, do not buy the Chinese version.
Original thread is here: https://forums.oneplus.net/threads/oneplus-2-regional-versions-explained.338780/
Regards
---------- Post added at 12:32 AM ---------- Previous post was at 12:11 AM ----------
Here is procedures to unlock LTE bands in Xiaomi Mi Note Pro. Both mobiles (Xioami and OP2) built same processor so maybe this method is for us. I did not tried it yet.
http://forum.xda-developers.com/mi-...how-to-unlock-lte-frequency-bands-mi-t3215880
I'm in the UK and about to buy a LG V20 VS995 from Hong Kong off of Ebay. Pretty sure I've checked the available frequencies here especially the 800 & 900MHz bands as these are the ones which travel the furthest and are able to penetrate buildings better than the higher frequencies. I've attached a table of the main UK networks and what bands they use. So can anyone let me know I've got this right before I purchase. Many thanks
Hi
I am in the UK also and currently using O2 with no problems. I have also used an EE SIM again with no problems. The only thing you need to be aware that the VS995 will not pick up the SIM APNs automatically, at least that is what I found, so you will need to find the APN for whichever network you use. There are off-line APN finders you can find via Google. Hope this is of some help.
Sent from my Nokia 7 plus using Tapatalk
Ferg8080 said:
I'm in the UK and about to buy a LG V20 VS995 from Hong Kong off of Ebay. Pretty sure I've checked the available frequencies here especially the 800 & 900MHz bands as these are the ones which travel the furthest and are able to penetrate buildings better than the higher frequencies. I've attached a table of the main UK networks and what bands they use. So can anyone let me know I've got this right before I purchase. Many thanks
Click to expand...
Click to collapse
Hi, the LG V20 VS995 doesn't support ALL the bands used in the UK. It doesn't support one of the LTE bands used by Vodafone - the 2100Mhz band. So if you're on the Vodafone network, you may find that 4G/LTE speeds might be slightly slower.
I got all of this information from frequencycheck.com and it's usually where I get all my information on the bands that smartphones support.
The best option if you want to get a V20 that supports ALL bands in the UK (at this current time), is the LG V20 H990DS (Taiwanese Version).
That is the variant that I own and it supports every single band used in the UK.
The only other variant that supports all bands is the LG V20 H990N (Hong Kong version), but it only has Cat6 capability as opposed to the H990DS's Cat12 capability. Therefore, the maximum speed you'll be able to get is 300Mbp/s on the H990N - whereas on the H990DS you can get up to 600Mbp/s.
I got this information from techwalls.com/lg-v20-model-numbers-differences/
I hope that helped.
rikstar555 said:
Hi, the LG V20 VS995 doesn't support ALL the bands used in the UK. It doesn't support one of the LTE bands used by Vodafone - the 2100Mhz band. So if you're on the Vodafone network, you may find that 4G/LTE speeds might be slightly slower.
I got all of this information from frequencycheck.com and it's usually where I get all my information on the bands that smartphones support.
The best option if you want to get a V20 that supports ALL bands in the UK (at this current time), is the LG V20 H990DS (Taiwanese Version).
That is the variant that I own and it supports every single band used in the UK.
The only other variant that supports all bands is the LG V20 H990N (Hong Kong version), but it only has Cat6 capability as opposed to the H990DS's Cat12 capability. Therefore, the maximum speed you'll be able to get is 300Mbp/s on the H990N - whereas on the H990DS you can get up to 600Mbp/s.
I got this information from techwalls.com/lg-v20-model-numbers-differences/
I hope that helped.
Click to expand...
Click to collapse
I'm not really sure that's true according to gsmarena it does support band 4(1700/2100) admittedly that's not the same as 1(2100). I'm sorry but in my ignorance I don't know . Maybe someone who is more enlightened could tell us what the difference is. See here.
Also the bit about the Cat 6, 9, 12 with LTE does not really bother me. For the VS995 it's LTE-A (3CA) Cat12 600/150 Mbps but for the H990N it's LTE-A (2CA) Cat6 300/50 Mbps. Now I ask you is anyone on this planet going to realistically even touch or even dream of a download speed of 300Mbps on a mobile network. I'm not even remotely getting this on my home fibre and we're watching UHD movies!!
Did find this
LTE Band 1: This is one of the paired bands that was defined for the 3G UTRA and 3GPP rel 99.
LTE Band 4: This LTE band was introduced as a new band for the Americas at the World (Administrative) Radio Conference, WRC-2000. This international conference is where international spectrum allocations are agreed. The downlink of band 4 overlaps with the downlink for Band 1. This facilitates roaming.
I guess I'll soon find out, not sure how though
Ferg8080 said:
Did find this
LTE Band 1: This is one of the paired bands that was defined for the 3G UTRA and 3GPP rel 99.
LTE Band 4: This LTE band was introduced as a new band for the Americas at the World (Administrative) Radio Conference, WRC-2000. This international conference is where international spectrum allocations are agreed. The downlink of band 4 overlaps with the downlink for Band 1. This facilitates roaming.
I guess I'll soon find out, not sure how though
Click to expand...
Click to collapse
To be on the safe side, I would just go for the H990N or H990DS. You also don't get the horrible, disgusting Verizon watermarks and logos (software and hardware) if you go with either of the H990 variants. But if you're not going to be using Vodafone, it doesn't really matter - because Vodafone is currently the only UK network that uses B1(2100) for 4G/LTE. Have you already ordered the phone?
i have a h990n in the uk all networks with full 4g
Don't buy CDMA phones for use on GSM carriers, or phones not specific to your region! Though nearly all CDMA phones from Sprint and Verizon in the USA support GSM protocols like 2G: GSM, 3G: UMTS/HSDPA/HSPA+, and some LTE bands, they are not always accessible. VS995 doesn't support Vodafone UK's LTE B1. I ran into problems with invalid sims and poor coverage because not all bands were unlocked by Verizon. If you want a V20 save the hassle and buy a GSM unlocked V20: US996, H990, H910 (won't get OTA, so flash H915 KDZ), H915, H918.
More info: https://www.frequencycheck.com/countries/united-kingdom
patato21 said:
Don't buy CDMA phones for use on GSM carriers, or phones not specific to your region! Though nearly all CDMA phones from Sprint and Verizon in the USA support GSM protocols like 2G: GSM, 3G: UMTS/HSDPA/HSPA+, and some LTE bands, they are not always accessible. VS995 doesn't support Vodafone UK's LTE B1. I ran into problems with invalid sims and poor coverage because not all bands were unlocked by Verizon. If you want a V20 save the hassle and buy a GSM unlocked V20: US996, H990, H910 (won't get OTA, so flash H915 KDZ), H915, H918.
More info: https://www.frequencycheck.com/countries/united-kingdom
Click to expand...
Click to collapse
Had a look at the above link and have got the following compatibility
GSM: 2G, 2.5G 100% (2/2)
UMTS: 3G, 3.5G, 3.5G (4G speed) 100% (2/2)
LTE: 4G 75% (3/4)
So I'm chuffed especially after reading this concerning the band/frequency I'm missing...
2.6GHz frequency band
The 2.6GHz band is the other frequency which was auctioned by Ofcom and it’s essentially the opposite of the 800MHz band. So it’s not great at travelling over long distances, meaning that masts need to be closer together to deliver reliable coverage and as such it’s not so suited to rural areas.
It’s also not all that adept at penetrating walls so indoor signal on the 2.6GHz band won’t always be perfect.
But on the other hand with 35MHz blocks available it has a high capacity. So it can cope with thousands of simultaneous connections, which in that sense makes it a good fit for cities and other busy areas.
Click to expand...
Click to collapse
I ordered the phone and hope to get it in the next couple of weeks and I will post back my experiences. I ended up getting it at a good price too
Stransky said:
Hi
I am in the UK also and currently using O2 with no problems. I have also used an EE SIM again with no problems. The only thing you need to be aware that the VS995 will not pick up the SIM APNs automatically, at least that is what I found, so you will need to find the APN for whichever network you use. There are off-line APN finders you can find via Google. Hope this is of some help.
Sent from my Nokia 7 plus using Tapatalk
Click to expand...
Click to collapse
Out of curiousity were you able to update from Nougat to Oreo? I had a quick preliminary look and didn't see any straightforward method via official channels.
Ferg8080 said:
Out of curiousity were you able to update from Nougat to Oreo? I had a quick preliminary look and didn't see any straightforward method via official channels.
Click to expand...
Click to collapse
No, very few American V20 users have been able to update to Oreo as the providers have not released Oreo for the phone. To keep ahead with security updates I use a custom Rom on my V20 (Alpha Rom ) but you need to have the Bootloader unlocked and the phone rooted to use it. Hope this offers some clarity.
Sent from my Nokia 7 plus using Tapatalk
Stransky said:
No, very few American V20 users have been able to update to Oreo as the providers have not released Oreo for the phone. To keep ahead with security updates I use a custom Rom on my V20 (Alpha Rom ) but you need to have the Bootloader unlocked and the phone rooted to use it. Hope this offers some clarity.
Sent from my Nokia 7 plus using Tapatalk
Click to expand...
Click to collapse
Will probably stick with the stock ROM for a while until I'm settled in with the phone. Has choosing the Alpha rom negatively affected the performance of the camera or sound quality at all?
Some of the reasons for getting this phone is the renowned DAC and the camera esp in manual mode (apparently auto could be disappointing).
Ferg8080 said:
Will probably stick with the stock ROM for a while until I'm settled in with the phone. Has choosing the Alpha rom negatively affected the performance of the camera or sound quality at all?
Some of the reasons for getting this phone is the renowned DAC and the camera esp in manual mode (apparently auto could be disappointing).
Click to expand...
Click to collapse
No negative affects. Alpha Rom is actually based on the last stock Rom from Verizon with some modifications.
Sent from my VS995 using Tapatalk
Stransky said:
No negative affects. Alpha Rom is actually based on the last stock Rom from Verizon with some modifications.
Sent from my VS995 using Tapatalk
Click to expand...
Click to collapse
Okay thanks for all your help. I'm expecting to get my phone sometime before Christmas
Just looked at the delivery estimate and it was anywhere between Sept 4th and October??th and it was ordered about 10 days ago. I guess it's to be expected coming from Hong Kong.
:good:
Stransky said:
No, very few American V20 users have been able to update to Oreo as the providers have not released Oreo for the phone. To keep ahead with security updates I use a custom Rom on my V20 (Alpha Rom ) but you need to have the Bootloader unlocked and the phone rooted to use it. Hope this offers some clarity.
Sent from my Nokia 7 plus using Tapatalk
Click to expand...
Click to collapse
Well picked up my new V20 VS995 today and before I launch myself head long into customising it I've posted some questions in the main thread here I would really appreciate any help you might be able to give. I was going to post it here but I thought that would be unfair to load you with a barrage of questions.
The whole process seems so much more complicated than with my Note 4 and I there is a lot less handholding esp with the AΩ ROM'S initial post. For a relative novice it seems an absolute minefield.
Just got my refurbished Z3 compact D5803. I am surprised to see only 4 LTE Bands in service menu: 1,3,19,21. For me band 20 is important to get connected. What is the trick? When I looked arround for specs I read that D5803 supports band 20. There is no net/sim- lock.
Can anybody help me?
Rgds!
You likely don't have an actual D5803. The Japan DoCoMo model only supports LTE bands 1, 3, 19, and 21, so it sounds like you have the Japanese model flashed with D5803 firmware.
This kind of thing is not uncommon with these Chinese refurbs. Often they will sell refurbs of the Japanese models at a much lower cost than the international models (due to the restricted radio band support), but I have heard of isolated incidents of somebody buying a Chinese refurb of an international model & getting one that clearly has the motherboard from a Japanese model phone inside of it.