How Long Does 1GB of eSIM Data Actually Last?

1GB covers a full day of maps, messaging, and light browsing with room to spare, but it evaporates in under 20 minutes of HD video streaming. As a reference point, co:sim's own free eSIM trial gives exactly 1GB over 7 days, comfortably covering check-in, directions, and messaging on a short trip, but not a Netflix binge.

#The longer answer: what 1GB actually gets you, activity by activity

How far 1GB stretches depends entirely on what you're doing with it, and the range is enormous. Using Vodafone UK's own data usage guidance and Netflix's official data usage figures as reference points:

• Maps and navigation: extremely light. Standard turn-by-turn navigation uses only a few megabytes per hour once the map itself is cached, and offline maps (downloaded in advance on Wi-Fi) use close to zero ongoing data. A full day of live navigation rarely breaks 50MB.
• Messaging: negligible. Vodafone's own calculator estimates 1GB is enough to "send over 1.5 million WhatsApp messages" without photos or video — in practice, plain-text messaging is one of the lightest things a phone does.
• Light browsing and social media: moderate. Industry data-usage estimates put browsing and photo-based social feeds at roughly 20-120MB per hour depending on how image-heavy the pages are, so an hour of scrolling a text-and-photo feed fits comfortably inside 1GB with plenty left over.
• Music streaming: light to moderate. Vodafone puts high-quality (320kbps) streaming at just over 115MB per hour, meaning roughly eight hours of music fits in 1GB.
• Video calls: moderate to heavy depending on quality, commonly a few hundred megabytes per hour.
• HD video streaming: heavy. Netflix's own help center states High Definition streaming uses up to 3GB per hour and Standard Definition up to 1GB per hour — so 1GB of data buys roughly 20 minutes of HD video, or about an hour at SD quality.

#How far does 1GB actually get you on co:sim's free trial?

co:sim's free eSIM trial is a genuinely useful test case because the number is fixed and known in advance: 1GB, valid for 7 days from first connection, $0 charged at checkout (a card is collected only to verify you're a new user, not billed). Spread across a week, that 1GB is best treated as an airport-to-hotel connectivity bridge rather than a full data plan: enough for maps on arrival, checking in with people back home, browsing transit and restaurant options, and handling messaging apps for the whole week without much thought. It is not enough for daily video calls or any meaningful video streaming, and a single hour of HD Netflix would burn through most or all of it in one sitting.

If a trip needs more than that, either because it runs longer than a week or involves more than light browsing and messaging, co:sim's paid plans use the same delivery and installation process with larger fixed-data tiers. Browse the full range on the data-only plans page, or, if the trip covers multiple European countries, the same free-trial article notes co:sim's 33-country Europe plan as a same-process upgrade path once the free 1GB runs out.

#FAQ

#Is 1GB of data enough for a full day of sightseeing?

For maps, messaging, and light browsing, yes, comfortably. A day of periodically checking directions, replying to messages, looking up opening hours, and posting the occasional photo to a messaging app typically adds up to well under 200MB, according to Vodafone UK's data usage guidance. Where it falls short is anything video-heavy: watching videos on social media for an extended stretch, making frequent video calls, or streaming music or video continuously in the background all add up fast and can exhaust 1GB well before the day is over. The safest approach on a 1GB allowance is to download offline maps before you set out (so navigation costs almost nothing) and treat video as the exception rather than the default, saving it for moments you're back on Wi-Fi at the hotel.

#How many photos can I send on WhatsApp with 1GB?

Thousands. WhatsApp compresses photos automatically before sending, and Vodafone's own figures put plain-text WhatsApp messaging at roughly 1.5 million messages per gigabyte, with compressed photos adding only a small amount on top of that per image. In practical terms, sending or receiving photos throughout a normal day of travel, a few dozen at most, uses a small fraction of a single gigabyte. Where WhatsApp usage adds up faster is video: video messages and video calls use dramatically more data per minute than text or photos, so a trip that leans heavily on video calling home will burn through 1GB much faster than one that sticks to text and photos. For a short trip built around staying in touch by text and the occasional photo, 1GB is far more data than a typical WhatsApp user actually needs.

#Can I watch a movie on 1GB of data?

Not in HD, and only partially in Standard Definition. Netflix's own data usage page states that High Definition streaming uses up to 3GB per hour, so 1GB covers roughly 20 minutes of HD video, well short of any feature-length film. Standard Definition fares better at up to 1GB per hour, which stretches 1GB to about an hour, still short of most movies, and Netflix's lower-quality "Low" and "Medium" settings (0.3GB and 0.7GB per hour respectively) go further still if picture quality is a lower priority than actually finishing the film. The practical takeaway for travelers on a limited or free-trial data allowance is to plan on downloading video content over Wi-Fi before departure rather than counting on streaming it over mobile data.

#Does co:sim's free trial data reset or renew after 7 days?

No. The free eSIM's 1GB is a one-time allowance tied to a 7-day validity window that starts on first connection, not a recurring monthly amount, and it does not reset or renew on its own once the 7 days are up or the 1GB runs out, whichever comes first. If more data is needed, either to extend a trip past the free week or because 1GB wasn't enough, the same eSIM can be topped up with a paid plan rather than needing to claim a new free trial or reinstall anything. This is consistent with how co:sim's paid plans work generally: a top-up adds data to the same installed profile instead of requiring a fresh QR code and a new installation step.

Whether 1GB feels generous or tight comes down entirely to how much of it goes to maps and messaging versus video, and knowing that split in advance is what makes a free trial like co:sim's own 1GB, 7-day offer actually useful for planning a trip rather than a guessing game.