The following are our recommended frequency band operators:
America: Suggest T-Mobile
Australia: Optus / Telstra /Virgin Mobile/ Vodafone
Germany: E-Plus/ O2 / T-Mobile/Vodafone
France: Bouygues Télécom/ Free /Orange /SFR
Spain: Movistar/Orange/Vodafone / Yoigo
Italy: 3 (Tre) /Telecom Italia Mobile (TIM) /Vodafone /Wind
UK: 3 (Three) /EE (Everything Everywhere) /O2 /Virgin Mobile /Vodafone
SG M1, Singtel ,StarHub ,TPG Mobile  (support 3G,4G  (5G V10,V20))
Country Phone Operators  Frequency/Network
Canada V20,V10
Fido: 4G ,3G,2G
Rogers : 5G(n38) , 4G, 3G, 2G
Bell: 4G, 3G
Chatr: 4G, 3G
Public Mobile: 4G,3G
Telus : 4G, 3G
Videotron: 5G(n7), 4G, 3G
Freedom Mobile: 4G, 3G
Koodo: 4G, 3G
Vrigin Mobile: 4G, 3G
Fizz : 4G
NR: N1/3/5/7/8/20/28/38/40/41/77/78/79
FDD: B1/2/3/4/5/7/8/12/13/17/18/19/20/25/26/28A/28B/66
TDD: B34/38/39/40/41
WCDMA: B1/2/4/5/6/8/19
CDMA: BC0/BC1/BC10
GSM: B2/3/5/8
US V20,V10
AT&T: 5G(n5),4G,3G,2G
T-Mobile: 5G(n41), 4G, 3G,2G
U.S. Cellular : 4G, 3G
Verizon Wireless: 5G (n5) , 4G, 2G(CDMA)
C spire: 4G ,2G (CDMA)
Boost Mobile: 4G, 2G(CDMA, GSM)
FreedomPop: 4G, 2G(CDMA)
Google Fi: 4G, 3G, 2G(CDMA ,GSM)
Singapore V20,V10
M1, Singtel ,StarHub ,TPG Mobile 
support 3G,4G 5G
AU V20,V10
Vodafone : 5G,4G, 3G,2G(GSM)
Telstra: 5G,4G,3G, 2G(GSM)
Optus:5G,4G,3G
UK V20,V10

EE : 5G(n78), 4G, 3G, 2G(GSM)

O2: 5G,4G, 3G, 2G(GSM)

Virgin Mobile : 5G, 4G, 3G,2G(GSM)

Vodafone: 5G, 4G,3G,2G(GSM) 3(Three): 5G,4G,3G

DE V20,V10

 O2 KPN: 5G, 4G,3G,2G(GSM)

Deutsche Telekom :5G,4G,3G, 2G(GSM)

Vodafone: 5G,4G,3G,2G(GSM)

FR V20,V10

Bouygues Télécom: 5G, 4G,3G,2G(GSM)

Orange : 5G, 4G, 3G,2G(GSM)

SFR: 5G,4G,3G,2G(GSM) Free: 5G,4G,3G

IT V20,V10

Telecom Italia Mobile TIM: 5G,4G,3G,2G(GSM)

Vodafone:5G,4G,2G(GSM)

Wind Tre: 5G, 4G, 3G,2G(GSM)

Iliad:5G,4G,2G(GSM) Fastweb: 5G

ES V20,V10

Movistar: 5G,4G,3G,2G(GSM)

Orange: 5G, 4G,3G,2G(GSM) Vodafone: 5G, 4G, 3G, 2G(GSM)

Yoigo: 5G, 4G, 3G ,2G(GSM)

US S97PRO,S96PRO

T-Mobile: 4G, 3G, 2G(GSM)

AT&T: 4G,3G, 2G(GSM) Verizon : 4G

2G:GSM(B2/3/5/8)
3G:WCDMA(B1/2/4/5/8)
4G:TDD(B38/40)
4G:FDD(B1/2/3/4/5/7/8/12/13/17/18/19/20/25/26/28A/28B/66)
CA S97PRO,S96PRO

Fido: 4G,3G, 2G(GSM), Rogers wireless : 4G, 3G, 2G(GSM)

Bell Mobility: 4G,3G

Chatr: 4G, 3G

Public Mobile: 4G,3G Telus: 4G, 3G

Videotron: 4G, 3G Freedom Mobile: 4G, 3G Koodo: 4G, 3G

Virgin Mobile: 4G, 3G

MX S97PRO,S96PRO

Movistar : 4G , 3G,2G(GSM) 

Telcell: 4G,3G,2G(GSM) , Altan Redes: 4G,3G,2G(GSM)

AT&T: 4G, 3G

AU S97PRO,S96PRO

Vodafone : 4G  3G 2G(GSM) 

Telstra: 4G, 3G,2G(GSM),

Optus : 4G,3G

 

EU S97PRO,S96PRO
Movistar: 4G,3G,2G(GSM)
Orange:4G, 3G,  2G(GSM)
Vodafone: 4G,3G,2G(GSM)
O2 KPN: 4G,3G,2G(GSM)
O2: 4G,3G,2G(GSM)
Virgin Mobile: 4G,3G,2G(GSM)

Note: We confirm that the mobile phone frequency band matches
However, the Sim may not be used due to the certification of the operator.If it appears, please directly contact the corresponding operator to make it clear that the Sim card is normal and the mobile phone frequency band is supported. Then the operator will modify their background to assist in the successful use of their network.
The following are our recommended frequency band operators:

https://www.kimovil.com/en/frequency-checker/SG

Vodafone users and other operators not on the list need to check: