My experience with mnp in store and online.
Last year December i mnp 2 number using both method.
In store (maybe is dealer)
They take one month payment and preactivate the plan.
When successfully port in, the sim is inactive because balance 0, altho it has subs next35.
I called digi they said is a bug, because balance 0 the next35 plan will auto cancel/inactive. They help contact the dealer to buy the next35 again.
NOTE: even topup rm5 it will not activate back the plan! U must contact the dealer or digi cust service for it.
Online mnp digi site
Same paid one month next35 and received sim activated. Balance 1 sen and sim is active.
went back to the store, they quickly top up RM20 for my number without any question. seems like a common thing.
converted physical sim to e-sim, everything works fine. somehow feels like a breath of fresh air after yodoo e-sim that refuses to activate VoLTE for me after a month contacting support.