After researching, I found that Black B10 plan is very affordable compared to my current prepaid plan with *yellow* telco. Would like some further details from users: -

- anyone using the B10 plan on an esim? For some reason, only B39 plan and upwards are offered esim. I am using Pixel 3a and want to park my main number on the esim and leave the physical slot vacant for other sims when travelling.

- do Black plans have international roaming? I know they have "XOX Data Roaming" but I only need roaming to receive SMS and missed calls. For data, I can just use the physical sim slot with a better value data roaming package from other local or overseas telcos. I am not sure whether must subscribe to "XOX Data Roaming" for roaming to even work.

- any problem with receiving TACs from banks? Nowadays,TACs are required for many transactions. Even non-bank apps require TACs.

Thanks in advance.

What if I MNP to B39 esim first, then after 1 billing cycle downgrade to B10 without having to change sim? Workable?