I have a iphone 5....it's model A1428 but it's not working 4G network...Help Me Please!

i have a iphone 5....it's model A1428 but it's not working 4G network...Help Me Please!

Hi rushandias,
Thanks for visiting Apple Support Communities.
The steps in this article can help with troubleshooting your cellular data connection:
iPhone: Troubleshooting a cellular data connection
http://support.apple.com/kb/ts3780
All the best,
Jeremy

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