Manage notifications on Sigma Mobile devices

Instructions to turn notifications on or off on Sigma Mobile devices

Sigma Mobile X-treme PQ52 Sigma Mobile X-treme PQ52
Sigma Mobile X-treme PQ53 Sigma Mobile X-treme PQ53
Sigma Mobile X-treme PQ54 Sigma Mobile X-treme PQ54
Sigma Mobile X-treme PQ37 Sigma Mobile X-treme PQ37

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