3G modem USA signal frequencies

[bobdxcool]

Hi guys

I was looking to buy a 3G modem for raspberry pi that would work with Tmobile/At&t SIM in USA. Because 3G frequencies are different for different modems.

the modems which I require are below. Can anyone please tell me if these get 3G/4G signal with Tmobile/At&t SIM. Please specify which sim card these modems will work with in USA>

1. Huawei E303- 3G HSPA/HSUPA/HSDPA/HSPA/UMTS/WCDMA 850/2100MHz 2G GSM/GPRS/EDGE 850/900/1800/1900MHz

2. Huawei E220-UMTS Frequency bands 850/1900/2100
GSM Frequency bands 850, 900, 1800, 1900


3G (UMTS/HSDPA) frequency supported 2100 MHz
EDGE frequency supported 900, 1800 and 1900MHz
GPRS frequency supported 900, 1800 and 1900MHz
GSM frequency supported 900, 1800 and 1900MHz
Support for USA / Canada Yes for GPRS/EDGE access at 1900MHz

3. Huawei E1750- HSDPA / HSUPA / UMTS - 2100MHz.
EDGE / GPRS / GSM - 850/900/1800/1900MHz.

4. ZTE MF628
2G EDGE / GPRS / GSM - 900/1800/1900MHz
3G HSDPA / UMTS - 2100 MHz

 

[brian25]

i think if the network carrier supports that GSM frequency bands you will have no problem choosing any of them.
usa still use of 2G/3G frequency

https://www.tech-recipes.com/rx/149...-network-frequencies-and-phone-compatibility/