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Repair guides and support for phones manufactured by Oppo Electronics Corp.

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Cannot reach 4G data connection

All of a sudden, my F1s stopped from reaching 4G connection. The only thing it could reach was E or H, however, it was too intermittent. Most of the time, it has no network connection.

I updated Colors OS hoping it would fix the issue, however, it was no good.

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@codycaleb notify your service provider and try a new SIMcard

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Rusty Edd Pagayon will be eternally grateful.
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