System crash after logging into 4G

Sometimes the phone (OS OS 16.06) has a black screen and doesn’t do anything anymore. I only way to reactivate the phone is removing the battery.
I experienced that this happens soon, when a 4G network is available. When I limit to 3G the phone works stable, even in a H+ network.
May be thereis a problem with a high data stream or an incampatibility with the 4G network (Telekom Germany).

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