Optimum Mobile leverages T-Mobile 4G LTE and 5G networks. Largest based on comparison of T-Mobile, Verizon and AT&T 5G coverage areas. Fastest based on Opensignal 5G User Experience Report January 2021. Most reliable based on Umlaut 2021/04 5G Audit Report. 5G capable device required. 5G not available in all areas.
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