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Dual SIM standby phones allow both SIMs to be accessed by using time multiplexing. When one SIM is in active use, for example on a call, the modem locks to it, leaving the other SIM unavailable. Older examples of dual-SIM standby phones include the Samsung Galaxy S Duos, [23] the Sony Xperia M2 Dual, [24] and the iPhone XS, XS Max and iPhone XR ...
Dual SIM devices have two SIM card slots for the use of two SIM cards, from one or multiple carriers. Multiple SIM devices are commonplace in developing markets such as in Africa , East Asia , South Asia and Southeast Asia , where variable billing rates, network coverage and speed make it desirable for consumers to use multiple SIMs from ...
If SIM 2 is in use, a caller to SIM 2 will be redirected by the carrier network as though the phone were off or out of range. E.g., to voicemail. This is the default behaviour, and it is what happens if “Dual SIM Always On” is set to "Offline". Setting “Dual SIM Always On” allows a call on one SIM to interrupt a call on the other SIM.
Mobile phones contain both cellular and non-cellular radios used for voice and data communication. There are also two types of dual-mode phones which use cellular radio which will contain GSM/CDMA/W-CDMA as well as other technology like IEEE 802.11 radio or DECT (Digital Enhanced Cordless Telecommunications) radio.
Some providers achieve this automatic call interception and callback by encoding a program onto the SIM card. Other providers use Multi-IMSI (International Mobile Subscriber Identity) technology to lower the cost of roaming. In this case, there is a program on the SIM card that selects the lowest cost IMSI (or 'profile') to use in a specific ...
The Lumia 950 supports 4G LTE technology with maximum transfer speeds of 300 Mbit/s (150 Mbit/s for the dual-SIM version). Other wireless connectivity options include dual-band Wi-Fi 802.11 a/b/g/n/ac, Wi-Fi hotspot, NFC, Bluetooth 4.1, and wireless screen projection via Miracast.