Most rural areas not covered with 3G signal...how to use U Mobile in Sabah? Unless you only stay at urban areas or only visit those famous tourist attractions like Kundasang. If not most of the time you will see "emergency calls only" on your phone.

From my own experience, not really. I don't think there's any telco in Malaysia can keep you 100% connected when you driving on Pan-Borneo Highway at this moment.

But this is not a permanent plan right? If it's permanent then this is a good option for others who need more high speed data without limited hotspot restriction.

Depends on the user's usage pattern, if you need high speed internet or hotspot a lot then Digi should be better if this is a permanent plan. 40GB not enough can top up extra 10GB quota for RM10.

Digi didn't classify these plans under internet cili padi which is doesn't have auto renew or bigbonus on their website. Maybe need someone who use NEXT plan to confirm whether these plans are auto renew or not.