BBK Vivo X21 Dual SIM TD-LTE HK 128GB vs. HTC S640 (HTC Iris 100) Frequency Band Comparison
Comparison Criteria
Frequency Band Comparison
Select a band for more details
| Frequency Band |
BBK Vivo X21 Dual SIM TD-LTE HK 128GB View device details |
HTC S640 (HTC Iris 100) View device details |
|---|---|---|
| GSM 850 MHz | Yes | No |
| GSM 900 MHz (E-GSM) | Yes | No |
| GSM 1800 MHz (DCS) | Yes | No |
| GSM 1900 MHz (PCS) | Yes | No |
| CDMA BC0 (800 MHz) | No | Yes |
| CDMA BC1 (1900 MHz PCS) | No | Yes |
