Frnds if you migrated to welcome offer just follow below steps to get preview offer again.
* First delete your all jio apps including myjio app
* Now download MyJio v3.2.053.
* Now turn off your data connection and open myjio app then Click on get jio sim options and now turn on your data connection.
* You will get a msg like congratulations you have activate your preview offer popup
* Now just go back and immediately click on skip login or sign up Button
* Now you automatically login to your jio Account.
* Congrats your jio preview offer come back without any 4GB data limit.
* Now use unlimited Data with unlimited speed.
* Most important thing never open my jio app and other Jio apps and never try to update and login otherwise you will again convert to welcome offer.
* First delete your all jio apps including myjio app
* Now download MyJio v3.2.053.
* Now turn off your data connection and open myjio app then Click on get jio sim options and now turn on your data connection.
* You will get a msg like congratulations you have activate your preview offer popup
* Now just go back and immediately click on skip login or sign up Button
* Now you automatically login to your jio Account.
* Congrats your jio preview offer come back without any 4GB data limit.
* Now use unlimited Data with unlimited speed.
* Most important thing never open my jio app and other Jio apps and never try to update and login otherwise you will again convert to welcome offer.