Can a phone that doesn’t support 4G use a 4G SIM card?

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A phone that doesn’t support 4G cannot use 4G networks due to hardware limitations, even if a 4G SIM card is inserted. However, 4G SIM cards are backward compatible with 3G or 2G networks, so the phone will connect to 3G or 2G networks instead.

Does it help?

Yes

No