Carrier Aggregation B3+B20 NOT WORKING!!! - Xiaomi Poco F1 Questions & Answers

I just changed my cell carrier and it uses bands B3 (1800MHz) and band B20 (800MHz), but Pocophone does support carrier aggregation for B3+B20 band. Currently phone on single LTE band, and the speeds are poor.
Is there a way to activate B3+B20 CA mode?

Nobody knows?

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I have a question that Wether OnePlus 3 Supports Carrier Aggregation (India Version/Asia Version) Here a carrier Reliance Jio has started Carrier Aggregation In B3-B5(850Mhz - 1800Mhz) and In some Cities as B3-B40(FDD 1800Mhz and TDD 2300Mhz) If so Then How to Enable Carrier Aggregation in Oneplus 3 Pls suggest me and give me some Answer I am struggling here for speeds

3G and LTE bands?

I'm wanting to get the unlocked V30 but I noticed that it has band 4(1700) on LTE but not 3G/UMTS and other phones have it listed for 3G and 4G/LTE. Does the V30 not have band for for 3G or since it has it on the 4G side does it apply to 3G as well and it's just not listed?

S9+ China on T-Mobile US

I have a new unlocked S9+ China (SM-G9650/DS, Qualcomm Snapdragon 845), and I'm trying to figure out if it is fully supported by T-Mobile in the US. I've done some Googling on this, but I'm not sure I understand the results. The supported band specs for the phone, and the T-Mobile frequencies used, are below. Can someone confirm or comment whether the phone is fully supported, or if not what's missing? Thx, Gus
S9+ China SM-G9650/DS Specs:
GSM Mhz band: Quad-Band 850/900/1800/1900
2G network: CDMA 800, GSM 850/900/1800/1900
3G network: CDMA2000 1xEV-DO
TD-SCDMA 1900/2000
UMTS 850/900/1700/1900/2100
4G network: LTE Cat18 700/800/850/900/1700/1800/1900/2100/2300/2600
(Bands 1,2,3,4,5,7,8,12,18,19,20,28,29,30)
TD-LTE 1900/2300/2500/2600 (Bands 38,39,40,41)
Data network: GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A
T-Mobile Frequencies:
LTE Frequencies:
1700 MHz & 2100 MHz AWS band 4
1900 MHz PCS band 2 (in refarmed areas)
Lower 700 MHz band 12 (in development) / in service in selected areas
3G/4G Frequencies (WCDMA):
1700 MHz & 2100 MHz AWS band 4
1900 MHz PCS band 2 (in refarmed areas)
2G Frequencies (GSM/GPRS/EDGE):
1900 MHz PCS band 2
gus_zernial said:
I have a new unlocked S9+ China (SM-G9650/DS, Qualcomm Snapdragon 845), and I'm trying to figure out if it is fully supported by T-Mobile in the US. I've done some Googling on this, but I'm not sure I understand the results. The supported band specs for the phone, and the T-Mobile frequencies used, are below. Can someone confirm or comment whether the phone is fully supported, or if not what's missing? Thx, Gus
S9+ China SM-G9650/DS Specs:
GSM Mhz band: Quad-Band 850/900/1800/1900
2G network: CDMA 800, GSM 850/900/1800/1900
3G network: CDMA2000 1xEV-DO
TD-SCDMA 1900/2000
UMTS 850/900/1700/1900/2100
4G network: LTE Cat18 700/800/850/900/1700/1800/1900/2100/2300/2600
(Bands 1,2,3,4,5,7,8,12,18,19,20,28,29,30)
TD-LTE 1900/2300/2500/2600 (Bands 38,39,40,41)
Data network: GPRS, EDGE, CDMA2000 EV-DO Rev 0, CDMA2000 EV-DO Rev A, TD-SCDMA, UMTS, TD-HSDPA, HSDPA, HSUPA, HSPA+, TD-LTE, LTE, LTE-A
T-Mobile Frequencies:
LTE Frequencies:
1700 MHz & 2100 MHz AWS band 4
1900 MHz PCS band 2 (in refarmed areas)
Lower 700 MHz band 12 (in development) / in service in selected areas
3G/4G Frequencies (WCDMA):
1700 MHz & 2100 MHz AWS band 4
1900 MHz PCS band 2 (in refarmed areas)
2G Frequencies (GSM/GPRS/EDGE):
1900 MHz PCS band 2[/QUOTE
It will work on T-Mobile frequencies but you won't get Wifi Calling or voLTE. The stock CSC is TGY - Hong Kong, T-Mobile is TMB. I haven't found any way to change the CSC even with custom ROM, but assuming one became available you would trip Knox and lose Samsung Pay, Samsung Health, Secure Folder, OTA Updates and Factory Warranty. Some members have posted in regards to changing the CSC Code in the link below but I'm not certain it's working out. Good luck!
https://forum.xda-developers.com/galaxy-s9-plus/how-to/qualcomm-sm-g9650-hong-kong-china-t3764542
Click to expand...
Click to collapse
baring any unforeseen hidden stuff, you should be good to go for Tmobile...Minus the new Band 71 on the 600mhz spectrum. Honestly, unless you live in the area that will get this deployment, this shouldn't be of concern. As long as you can use Band 2/4/12, you will be ok with Tmobile.
I almost went with this route as well since I wanted to get a Snapdragon version with larger storage size. But I chickened out because I've been reading people having bad signals/not having full LTE speeds with their imported S9+ on TMOUS.
Good luck and let us know!
I used CT Excel Americas (T-mobile mvno) and it worked on CHC firmware. But I forgot to test volte etc.
kevinfan1990 said:
I used CT Excel Americas (T-mobile mvno) and it worked on CHC firmware. But I forgot to test volte etc.
Click to expand...
Click to collapse
Please post steps for this. I would like to get VoLTE and Wifi calling

Xiaomi Mi A3 enable 4G+ or Carrier Agregation on B2+B28 or other bands?

does anyone know if there is any way to activate carrier aggregation in the bands that this device is not taking as 4G +?
Does your carrier support B2+B28?
4.5G on Panamá uses this bands
qwertysmerty said:
Does your carrier support B2+B28?
Click to expand...
Click to collapse
Yes, I´m using Claro Panama in this bands, too Digicel & Cable&Wireless, and not enable LTE+ on Mi A3
Well my question was whether your carrier supports LTE-CA for B2+B28 rather than whether it supports separate bands. From wiki https://en.wikipedia.org/wiki/List_of_LTE_networks#Latin_America_(APT_band_plan) it seems only Digicel does CA_2A_28A in Panama.
If Claro supports CA_2A_28A wonder what carrier profile your phone uses. You could check that with QPST Advanced PDC Tool.
Xiaomi Mi A3 support only intra-band contiguous CA: https://cacombos.com/device?model=M1906F9SH

LM-V600VM (LG V60 Verizon) roaming bands

Hi I am planning to get a LG V60 Verizon Variant (network unlocked) but I have a problem with the band frequencies because the LTE band that is supported in my countrie are Band 3,28,41. I want to know if I inserted a sim (from my country) will I be able to access the bands that is listed as roaming in the LG V60 tech spec sheet without activating data roaming? or does the band only activates in data roaming?
Yes but do not have B41 so check region where you can use B41. with B28 and B3 no problem

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