Domestic smartphone-maker Intex technologies on Wednesday announced its partnership with Reliance Jio for making the Jio Preview Offer available on its 4G smartphones.With this, Intex users will be able to access an exclusive preview of the Reliance Jio 4G services for a period of 90 days for free. "Intex has one of the largest 4G portfolio of devices with compelling features and great prices. Through this partnership with Reliance Jio, we aim to bring to our consumers a truly differentiated 4G experience," said Gurbinder Sodhi, Head, LFR and Operator business, Intex Technologies, in a statement.Jio's 4G-LTE services include unlimited HD voice calls and video calls, unlimited SMS, unlimited high-speed data and a host of Jio Premium apps such as JioPlay, JioOnDemand, JioBeats, JioMags, JioXpressNews, JioDrive, JioSecurity and JioMoney.