did I buy a clone S9 plus? having so many problems, help would be awesome.

[jasonjm]

so I always buy dual sim unlocked SX phones, had no issues with the S7 or S8

I just bought 3 x S9 plus dual sim phones.

I only unpacked one. I am on the Tmobile network. I checked the APN settings all seems fine.

But, odds things are happening

1) when i make any call i immediately lose 4g, goes to H mode. then as soon as i hang up the phone goes back to 4g. Call quality is poor as i guess i am not getting voice over LTE
2) should a S9 plus be saying 4g or LTE in the display?
3) when I try check the bands with *#2263#, i get error Connection problem or invalid MMI code - is that the wrong code to check bands?

ok i did some research, I think the phone is legit, but the seller mislead me. When i look at the official specs i get - this is missing a lot of tmobile LTE bands

SM-G965F Exynos 9810 All Europe 2G GSM: 850/900/1800/1900
3G UMTS: 850 / 900 / 1700(AWS) / 1900 / 2100

4G FDD LTE: LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 17(700), 20(800), 28(700)

4G TDD LTE: B38(2600), B39(1900), B40(2300), B41(2500)

 

[jasonjm]

actually other pages state different bands are supported for this model, i dont know which pages to believe hmmm.

i wish i could have that code just work to tell me the bands the phone supports from the phone itself

 

[lucianus_luciferus]

gsmarena is pretty accurate on specs

 

[jasonjm]

thx. according to gsm arena the specs are correct

but phone still doesnt work properly, nor does *#2263# work

NETWORK Technology
GSM / CDMA / HSPA / EVDO / LTE
2G bands GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2
3G bands HSDPA 850 / 900 / 1700(AWS) / 1900 / 2100
4G bands LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 12(700), 13(700), 17(700), 18(800), 19(800), 20(800), 25(1900), 26(850), 28(700), 32(1500), 38(2600), 39(1900), 40(2300), 41(2500), 66(1700/2100)

 

[Fred98TJ]

Regarding your #1 . As you mentioned, that means you do not have VoLTE.

 

[andrew_ackley]

so I always buy dual sim unlocked SX phones, had no issues with the S7 or S8

I just bought 3 x S9 plus dual sim phones.

I only unpacked one. I am on the Tmobile network. I checked the APN settings all seems fine.

But, odds things are happening

1) when i make any call i immediately lose 4g, goes to H mode. then as soon as i hang up the phone goes back to 4g. Call quality is poor as i guess i am not getting voice over LTE
2) should a S9 plus be saying 4g or LTE in the display?
3) when I try check the bands with *#2263#, i get error Connection problem or invalid MMI code - is that the wrong code to check bands?

ok i did some research, I think the phone is legit, but the seller mislead me. When i look at the official specs i get - this is missing a lot of tmobile LTE bands

SM-G965FExynos 9810AllEurope2G GSM: 850/900/1800/1900
3G UMTS: 850 / 900 / 1700(AWS) / 1900 / 2100

4G FDD LTE: LTE band 1(2100), 2(1900), 3(1800), 4(1700/2100), 5(850), 7(2600), 8(900), 17(700), 20(800), 28(700)

4G TDD LTE: B38(2600), B39(1900), B40(2300), B41(2500)

The dual SIM international phones never really work well with us carriers.

 

[jasonjm]

this exynos chipset on US carriers is a total disaster.

Also the fact that samsung OEM lock disables the phone for 7 days is mind boggling.

RMAing all 3 phones. Will just get a onetouch 5T dual sim.

 

[Amit Bhakay]

Have you received May update for S9+? It has many fixes on call quality issues. Not sure. if it has fix for your issue.

 

[chanchan05]

Have you received May update for S9+? It has many fixes on call quality issues. Not sure. if it has fix for your issue.

Won't really fix his issue. The issue here is mainly the fact that US carriers handle things differently from the rest of the world, so bringing a non-US phone into the US for daily use will really cause several issues.

 

[Itsa_Me_Mario]

Did you buy these directly from Samsung or from a carrier or from a third party?