iPhone 6 (No Service / Searching.....) IOS 9.0.2 (Please Help!!!

Dear Apple

I'm using iPhone 6 in Liberia.... Most of the times my phone say, no service or searching... which after a while comes back on but from Yesterday, it's not connecting anymore. My Samsung works flawlessly but my I6 is a pain and it has my company number. I have tried everything including restoring via itunes and still nothing. This is really embarrassing. Please HELP! I'm Voits Winkler a IT Technician working with ArcelorMittal, Liberia. SOS

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