Grab vs Bolt Bangkok: Data Usage for Ride Hailing

Grab and Bolt use roughly 2MB to 5MB of data to book a ride, but the real consumption comes from real-time GPS tracking and high-resolution maps, which can use 30MB to 50MB per hour of active use. For most travelers in Bangkok, a 5GB to 10GB plan is the sweet spot to cover daily ride-hailing, navigation, and social media. Using a local eSIM ensures you aren't hit with massive roaming bills while stuck in Sukhumvit traffic.

The Bangkok Ride-Hailing Landscape

If you are heading to the Land of Smiles, you already know that Bangkok's traffic is legendary—and not in a good way. Whether you are navigating the neon lights of the city or deciding between Sukhumvit vs Silom for your hotel base, you are going to need a reliable way to get around. Gone are the days of haggling with tuk-tuk drivers who want to take you to their cousin’s gem shop. Today, it is all about Grab and Bolt.

But here is the catch: these apps are data-hungry. They rely on constant GPS pings, real-time traffic updates, and high-resolution map rendering. If you are still using your home SIM from Telstra or Optus, those daily roaming charges will stack up faster than a queue at a pad thai stall. AussieRoam offers a way to sidestep those fees by connecting you directly to local Thai networks like TrueMove H and AIS the moment you touch down.

Grab: The Heavyweight Super-App

Grab is the undisputed king of Southeast Asia. It is not just a ride-hailing app; it is a "super-app." You can order food, send parcels, pay for groceries, and even book a hotel. However, all that functionality comes at a cost to your data plan. Because the app is constantly loading promotions, nearby restaurant icons, and various service modules, it is significantly heavier than its competitors.

When you open Grab at Suvarnabhumi Airport, the app immediately starts pulling data for your location, nearby drivers, and current surge pricing. A single session to book a car can use up to 5MB before you even get in the vehicle. Once the ride starts, the app keeps the map active to show your progress. In Bangkok’s gridlock, a 10km trip can easily take 45 minutes, during which Grab will continue to refresh its data.

Bolt: The Lean Challenger

Bolt is the scrappy newcomer that has taken Bangkok by storm, mostly because it is often 20-30% cheaper than Grab. From a data perspective, Bolt is also the leaner option. The app is focused almost entirely on transport. You won't find icons for grocery delivery or insurance popping up and sucking away your megabytes.

In our testing, Bolt uses about 30% less data than Grab for the same journey duration. It uses a simplified map interface and fewer background processes. If you are on a tighter data budget—perhaps using one of our smaller 1GB or 2GB see plans—Bolt is the more efficient choice for getting from A to B.

Data Usage Comparison Table

To give you a clearer picture, here is how the two apps stack up when it comes to your data bucket:

Activity	Grab (Estimated)	Bolt (Estimated)
App Launch & Initial Search	3-5 MB	1-2 MB
Booking a Ride	1-2 MB	0.5-1 MB
Active Tracking (per 10 mins)	5-8 MB	3-5 MB
Background Data Usage	High	Moderate
App Size (iOS/Android)	~350 MB	~120 MB

Why Your Home Carrier is Not the Answer

For Australians and Kiwis, the temptation to just leave your home SIM in and pay the "International Day Pass" fee is real. Telstra charges $10 per day, and Optus has similar daily roaming hits. If you are in Thailand for two weeks, that is $140 just to have the privilege of using your own data.

Even worse, roaming data is often "deprioritized." This means when the network gets busy in a crowded area like Siam Square, the local TrueMove H or AIS customers get the fast lanes, while roaming users get the leftovers. With an AussieRoam eSIM, you are treated like a local. You get 5G access on the same networks the locals use, ensuring your Grab driver’s location doesn't lag while you are trying to find them in a crowded pick-up zone.

Network Coverage: TrueMove H vs AIS vs DTAC

When you see plans for Thailand, you will notice we use the big players. Here is the reality of coverage in Thailand:

• TrueMove H & AIS: These are the gold standards. They have incredible 5G penetration throughout Bangkok, including inside the MRT (subway) and on the BTS (Skytrain) platforms. If you are planning on moving from Phuket to Krabi, these carriers offer the most consistent signal along the coastal roads.
• DTAC: Excellent in urban centers like Bangkok and Chiang Mai. While their rural 5G footprint is slightly smaller than AIS, they offer blistering speeds in the city, perfect for uploading those sunset cocktails at a rooftop bar to your stories.

Our eSIMs are data-only, meaning you don't get a local +66 phone number. In the modern era, you don't need one. Both Grab and Bolt allow you to communicate with drivers via their in-app chat and VoIP calling features. Plus, your WhatsApp, Messenger, and Viber will work perfectly on your AussieRoam data, so your family back home can still reach you on your original number.

How to Install Your eSIM Before You Land

Don't be the person squinting at a tiny SIM tool in the middle of a humid airport terminal. You can set everything up before you leave Sydney, Melbourne, or Auckland. First, make sure your phone is on our list of compatible devices.

For iPhone Users:

1. Open Settings > Cellular.
2. Tap Add eSIM.
3. Scan the QR code provided by AussieRoam in your email.
4. Label the new plan "Thailand" or "Travel."
5. Set your Primary line for Calls/SMS (to keep your Aussie number active) and the AussieRoam plan for Cellular Data.
6. Turn off Allow Cellular Data Switching to avoid accidental roaming charges on your home SIM.

For Android Users:

1. Go to Settings > Network & Internet.
2. Tap the + or SIMs.
3. Select Download a SIM instead?.
4. Scan your AussieRoam QR code.
5. Once installed, ensure the AussieRoam eSIM is selected for data in your SIM manager settings.

You can find more detailed instructions on how it works on our setup page. The key is to toggle the "Data Roaming" switch to ON for the AussieRoam eSIM specifically, but keep it OFF for your home Aussie/Kiwi SIM.

Pro Tips for Saving Data in Bangkok

If you have opted for a smaller data plan, there are ways to make it stretch further while still enjoying the convenience of ride-hailing:

1. Download Offline Maps: Google Maps allows you to download the entire Bangkok metropolitan area for offline use. Grab and Bolt will still need data to function, but the base map layers won't need to be downloaded constantly over the air.
2. Use the In-App Chat: Instead of calling your driver (which uses more data via VoIP), use the text chat. You can even send photos of your exact location to help them find you.
3. Kill Background Refresh: Go into your phone settings and disable "Background App Refresh" for apps you aren't using. You don't need Facebook updating your feed while you are trying to navigate the Chatuchak Weekend Market.
4. Connect to BTS Wi-Fi: Many major malls and transit hubs have free Wi-Fi. Use these to book your ride, then switch back to your eSIM once you are on the move.

The bottom line

Whether you choose Grab for its reliability or Bolt for its lower fares, having a dedicated data connection is non-negotiable in Bangkok. An AussieRoam eSIM gives you the freedom to compare prices between both apps in real-time without worrying about your data balance. Skip the Telstra roaming trap, install your eSIM at the airport, and land in Thailand ready to explore. It is the smartest move you will make all trip.