what is dual standby

... sim standby Folding design and best quality FM suit for male and female use flip mobile phone E1272 sim standby Folding design ...

... Sim Standby Wireless Cellphones COLOR: purple, black OS: Android 2.3 CPU: MediaTek MTK6516, 256MB ROM+256MB RAM Network: Quad band GSM 85...

...Backup Phone: 900mAh Battery; Camera: front 2.0 Mpx(with Beautifying), back 2.0 Mpx(Note: Only one rear camera is real and can be used normall...

Windows XP 4G GPS GSM GPRS Module HL6528 Sim Standby HL6528 : GSM/GPRS module HL6528-G: GSM/GPRS+GNSS (GPS+Glonass) Module Product Introduct...

4 Channel SD Card Mobile DVR Card Standby For Vehicle Monitoring This mobile video recorder with double SD card slot is suitable for buses, ...

5 Watt High Power Long Distance Walkie Talkie UV-6 Dual Band Dual Standby PC Programming 1. 16CHs which can memory 128 groups frequency 2. Voice Guide...

Rugged Ublox M8N GPS Smartphone, 4GB+128GB Android 10.0, IP 67 Waterproof, 6-inch HD+, Dual SIM Cards Product information: IP67 Waterproof, Dustproof,...

High Strength Battery 2sim GSM Phone Dual Card Slot Can Take Pictures CDMA 800MHz Phone Precautions: 1. This product should not be used near garages, ...

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BM10 Wireless Bluetooth Dialer Mini phone with Earphone Hand-free Headset Smaller mini small size mobile phone cellphone, from Conn Electronic CO.,Ltd...

... Band Product Description 1) IP67 waterproof and dustproof (Not diving) 2) Relay Forwarding Confirmed (1750 HZ) 3) Band, Display and ...

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Perkins 150kva standby power generator 1. Mainly suitable for outdoor power 2.automatic monitoring without duty 3.dual power intelligent switching 4. ...