SIM only plan won't include free caller ID (unless port-in / new line, and temporarily for max 6 month). But for CIS customer M1 will give free caller ID and free roaming subs. along with standard perks u get with personal plan (30GB, 1000 min, 1000 sms, spotify data, etc). And on top of that I also noticed getting free weekend data too.Sim only offer for cis customer?
Hence I converted mine to CIS to get the perks. I think it's the best deal for now.
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