How to fix Fb messenger what's app no connection issue on Lenovo k3 note /a6000+ & all devices

Q.. How is this error occurs
Ans. Due to wrong default apn setting

Q.When this error occurs
Ans.  When you insert vodafone sim card to your device

Q. How to fix this issue
Ans..

1. Goto settings & click on Mobile networks

2. Click on access point names

3. Choose vodafone 

4. Set default apn to vodafone connect {as shown in image}

Done

Now you have successfully solved your error

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