No 5G in dual sim


dakmary

Members
Sep 15, 2020
1
3
As the title says, I immediately loose 5G once I enable the second sim. Once I disable it, 5G is back on. Too bad as I usually use one sim for calling and the other for data. Is there a fix?

BTW the 5G speed I get is around 600-700mb
 
All 5G devices with Qualcomm processor have the same issue

Sent from my Mi 10 Pro using Tapatalk
 
I will write by a nexample on Xiaomi Mi 10 Pro 5G China variant, rooted, with enabled QXDM diag port.

In EFS there is a file china_msim_restrictions.xml which contains the following section:

<rf_band_list ns="global" name="post:disable_NR_bands">
<gw_bands base="current" />
<lte_bands base="current" />
<tds_bands base="current" />
<nr5g_sa_bands base="none" />
<nr5g_nsa_bands base="none" />
</rf_band_list>

<if>
<all_of>
<subs_is_active subs="this" />
<subs_is_active subs="other" />
<not> <location_mcc_in list="post:china_mccs" /> </not>
</all_of>
<then>
<rf_bands list="post:disable_NR_bands" />
</then>
<else>
<rf_bands list="post:default_bands" />
</else>
</if>

which basically means, if you do not have China's SIM you will have 5GNR bands disabled
 
I will write by a nexample on Xiaomi Mi 10 Pro 5G China variant, rooted, with enabled QXDM diag port.

In EFS there is a file china_msim_restrictions.xml which contains the following section:

<rf_band_list ns="global" name="post:disable_NR_bands">
<gw_bands base="current" />
<lte_bands base="current" />
<tds_bands base="current" />
<nr5g_sa_bands base="none" />
<nr5g_nsa_bands base="none" />
</rf_band_list>

<if>
<all_of>
<subs_is_active subs="this" />
<subs_is_active subs="other" />
<not> <location_mcc_in list="post:china_mccs" /> </not>
</all_of>
<then>
<rf_bands list="post:disable_NR_bands" />
</then>
<else>
<rf_bands list="post:default_bands" />
</else>
</if>

which basically means, if you do not have China's SIM you will have 5GNR bands disabled



I also found this in another forum. If you feel like you want to investigate or look for more info:


Seems like Mi 10 5G (and more Xiaomi phones) have locked its 5G capabilities to only some networks. The configuration is in the file NON-HLOS.bin

If you open it with 7zip and go to NON-HLOS.bin/image/modem_prm/cfg/config/sm/cfg_sw/genericEU you'll find it.


Do you think it would be possible to remove this restriction?

Source (in spanish): https://bandaancha.eu/foros/no-conecto-red-5g-1740671


I posted it in this other thread https://xiaomi.eu/community/threads/20-9-10.57356/page-7#post-561618 and Igor Eisberg answered me the following:


The path you mentioned is wrong, I think you meant NON-HLOS.bin/image/modem_pr/mcfg/configs/mcfg_sw/generic/EU.
In any case, we're not modifying anything related to the radio/baseband, and unless you have some more specific details on how such restriction is safely bypassed, there's nothing to be done on our side.
 
Last edited:
Great news!! Do you have some source or webpage that explains the issue and what's xiaomi doing to fix it? I'd like to know more about it :)

From Mi 10 Lite :)
Officially Mi 10 and Mi 10 Pro does not support dual sim... at least officially...
31906
 
As the title says, I immediately loose 5G once I enable the second sim. Once I disable it, 5G is back on. Too bad as I usually use one sim for calling and the other for data. Is there a fix?

BTW the 5G speed I get is around 600-700mb
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