Does Redmi k40 support 4g cards? -Can Redmi k40 insert 4G cards?

Redmi k40 really can't get it. Many people make other choices because they can't get it, or choose to add money to the scalper. As always, Xiaomi plays the monkey. Let's find out whether Redmi k40, a 5G mobile phone, can still use the 4G signal network.

Support, provide users with mobile phone cards of 5G and below.

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Related introduction mobile phone card slot:

SA/NSA dual-mode dual-card full netcom 7.0

Supporting dual cards is not limited to operators, and both primary and secondary cards can adopt 5G.

Supports dual Nano-SIM card slots, and dual cards can be used for any operator's 5G network access.

Support mobile/Unicom/telecom 5G/4G/3G/2G

Supports dual-card 5G dual-mode SA/NSA(Sub-6G)

Support dual-card VoLTE HD voice

Note ①: Whether or not to support 5G depends on the local operator network; When using two telecom cards, the secondary card can only register the telecom VoLTE network. If the secondary card or the local network does not support the telecom VoLTE service, it cannot be used.

Note ②: TD-SCDMA system (mobile 3G) is not supported;

Note ③: Whether SA/NSA is supported depends on the network and service deployment of local operators, and the SA function of the secondary card is supported through OTA upgrade;

Note ④: VoLTE service supports mobile/Unicom/telecom, and the actual usage depends on the local network and service deployment of the operator; Supported frequency band

Mobile phone network:

5G:n 1/n3/n28A/n 4 1/n77/n78

Note: The actual network and frequency band usage depends on the deployment of local operators, and n 1 and n3 need software upgrade support after the release of operators. n28A (Tx:703-733MHz，Rx:758-788MHz)

4G:FDD-LTE:b 1/B2/B3/B4/B5/B7/B8/b 12/b 17/b 18/b 19/B20/B26/B28A

TDD-LTE:B34/B38/B39/B40/b 4 1/B42

Note: LTE b 41(2496-2690 MHz); LTE B28A(Tx:703-733MHz，Rx:758-788MHz)

3G:WCDMA:b 1/B2/B4/B5/B6/B8/b 19； CDMA EVDO : BC0

2G:GSM:850/900/ 1800/ 1900 MHz； CDMA 1X : BC0

network protocol

WLAN protocols: WiFi 6 enhanced version, WiFi 5, WiFi 4 and 802.11a/b/g.

WLAN frequency: 2.4G WiFi | 5G WiFi

Support MU-MIMO, WiFi Direct, Miracast, 2.4G and 5G dual-channel concurrent 2x2 MIMO and 8x8 Sounding.

Bluetooth: Bluetooth 5.2

Support AAC/LDAC/LHDC