Huawei EVR-N29 Guide De Démarrage Rapide page 7

Dual SIM Card Management
Your device supports dual card dual standby. Under Settings >
Wireless & networks > Dual SIM settings, select the default
mobile data card and calling card as needed.
4G and 5G service depends on the support of your
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network provider and its deployment of relevant
services. Please contact your network provider to
activate 4G or 5G service.
If you have inserted two SIM cards, only the default
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mobile data card can support 5G service.
4G and 5G service may be unavailable in certain areas
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due to network interference.
If this guide is inconsistent with the description on the
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official website, the latter prevails.
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