Hi
[USER=22401]derrickhulsey[/USER]
Honestly your best bet is to book it via Klook before you arrive in Bali this can all be done by credit card/email.
https://www.klook.com/en-AU/search/?query=sim card bali
Make sure you specify the XL sim as they sell a few different brands and if you don't specify a brand they'll just give whatever.
I have used this company several times, pricing is fair and they have never let me down.
As for the specific questions:
I have some questions:
1) where is located the XL Axiata store in the airport? -
now not required but you won't miss it as you walk out in to Bali through arrivals you are forced past it and several others selling those sims
2) are they 24h available? Or do they have precise store hours? My flight will arrive at 7pm, and may have delays -y
es they will meet you when your flight arrives and hang around for 1 hour from the time you say it will land, they usually grab your flight number so I imagine if there is a delay they'll know and good chance those guys will hang around - side note if you want to get a ride to your hotel with them they usual always offered to match grab and go jek prices for me
3) I see that a famous site offer a "3G/4G Prepaid SIM Card (DPS Airport Pick Up) for Bali", is it secure? someone use it? -
how to answer that as you haven't specified what site so how can we comment? I have used the one I recommended and it worked perfectly several times now