If you're headed to Barcelona for Mobile World Congress this year, you may want to bring or buy a Vodafone SIM card for the best LTE speeds.
Our exclusive analysis of data from our partner Ookla Speedtest.net shows that Vodafone had the fastest LTE speeds in Barcelona during the month of January 2016, as well as the fastest LTE connections immediately surrounding the Fira Gran Via, where the trade show will be held, in January and February.
Speedtest.net's huge crowd of testers spans the globe, so we dipped into its Speedtest Intelligence portal to look at the thousands of tests run in Barcelona during January. As you can see, for LTE, Vodafone pulled ahead of second-place Movistar during that month, with Yoigo trailing way behind.
We also took a closer look at tests immediately around the Fira, finding about 1,000 tests on Android devices in that immediate area in January and February. Vodafone excelled there as well, with an average download speed of 54Mbps on LTE, as compared to Movistar and Orange, both around 37.5Mbps, and Yoigo around 19.5Mbps. For uploads near the Fira, Vodafone scored 22.3Mbps, while Movistar and Orange were just above 18Mbps and Yoigo languished down at 7.8Mbps.
Many people coming to MWC will be roaming on carriers that don't allow LTE access, so they'll be stuck on 3G. In that case, everyone gets download speeds averaging 7-8Mbps.
OpenSignal's State of LTE report mostly agrees with Speedtest's findings. According to OpenSignal, Movistar and Vodafone are two of the faster LTE providers in the world, easily outpacing all four of the major U.S. providers. That put Spain in the top quarter of countries for LTE speeds overall, according to OpenSignal. LTE coverage isn't spectacular, especially on Yoigo, but that should be less of a concern in urban Barcelona.
If you're roaming to Spain on a U.S. SIM, AT&T and Verizon both offer 4G LTE roaming in Spain. The "high speed data passes" on Sprint and T-Mobile max out at 3G speeds.
If you're looking for a SIM, our MWC travel guide recommends the "Vodafone in Spain for Tourists" SIM, which offers 60 minutes of calling plus 1.5GB of LTE data for 15 euros. To take advantage of LTE, make sure your unlocked phone supports LTE bands 3 and 7.
Now, of course networks are going to be weird during MWC. They'll be under massive load, and the carriers will probably bring their own portable cell sites to boost coverage. The networks are different enough from last year that MWC 2015 data probably won't tell us about this year's show, but Speedtest.net says that Vodafone led in Barcelona during March 2015, as well.
Keep an eye on PCMag.com for more MWC coverage when the world's biggest mobile phone trade show begins on Sunday, Feb. 21 with the introduction of the Samsung Galaxy S7 and LG G5 phones.
This article originally appeared on PCMag.com.