How dual 4G VoLTE works for UMIDIGI devices?Currently 4G smartphones on the market allow only the primary SIM card to support VoLTE, while the secondary card can only use 2G/3G, which diminishes the c …
Source: UMIDIGI Blog
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How dual 4G VoLTE works for UMIDIGI devices?Currently 4G smartphones on the market allow only the primary SIM card to support VoLTE, while the secondary card can only use 2G/3G, which diminishes the c …
Source: UMIDIGI Blog
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