Simify eSIM review - the BEST eSIM for the USA? (Tested for 1 month!)

Who is Simify?

At the heart of every travel daydream is the desire to just go—no fuss, no waiting, no messing about with roaming tricks or physical SIM cards.

That’s exactly the kind of spirit Simify is built for.

Founded in 2018 in Sydney by two friends, Simify began its journey by offering traveller-friendly SIM cards and has since evolved into a full-blown eSIM provider. 

Their mission? To give you convenience, transparency and the kind of connectivity that keeps up with life on the move.

They say: ditch the roaming fees, forget switching SIMs, and land in your next destination with data ready to go. 

Here are a few of the travel-friendly hallmarks that set them apart in a very crowded and competitive eSIM market:

• Global coverage and unlimited data options: For example, their “Unlimited Data” eSIMs span up to 111 countries and last up to 90 days.
  
• Instant digital delivery and set-up: You pick your plan online or via their app, install it via QR code or device settings, and you’re ready to go when you land. No waiting for post, no stuck in airports.
  
• Backed by reviews and a 100% money-back guarantee: They’ve got strong customer feedback (especially for ease of use) and state that if the eSIM doesn’t work due to coverage or device incompatibility, you’ve got refund protection

What plans do they offer?

With Simify, you get two main types of plan for the USA (and the nearby region of Canada & Mexico) that line up nicely with different travel styles.

• You’ll find standard data-allowance plans (e.g., 10 GB, 20 GB, 30 GB, up to 100 GB) for those who use a moderate amount of data.
  
  
• You’ll also find “unlimited data” plans for those who stream, hotspot, social upload and want to roam freely without constantly checking how many gigs you’ve used.
  
  
• Coverage tweaks: Some plans are USA only, others cover USA + Canada + Mexico.
  
  
• Prices vary depending on duration (7 days to 90 days) and data-amount. Always check the “sale” pricing, as Simify often runs discounts

The Global eSIM

I think it’s worth mentioning that Simify now offer a Global eSIM which includes the USA. 

This is a data-only eSIM plan from Simify that offers unlimited mobile data (no fixed GB cap) for a set duration (from 7 up to 90 days) and works across 111 countries worldwide.

It’s ideal for travellers visiting multiple countries (or who just want the freedom of “go anywhere” without buying a local SIM at each stop).

Here are some of the sample prices (UK/GBP) at time of writing:

• 30 Days unlimited: ~ £46.20 (regular ~£66) → about £2.20/day
• 45 Days unlimited: ~ £63.70 (regular ~£91) → ~£2.02/day
• 60 Days unlimited: ~ £82.60 (regular ~£118) → ~£1.38/day
• 90 Days unlimited: ~ £114.80 (regular ~£164) → ~£1.28/day

For someone hopping continents, paying roughly £1-£2 per day for truly unlimited data is a strong value when compared to typical roaming fees or buying local SIMs.

If for a future trip you were going to a number of different countries (Europe → Middle East → Asia) this global plan would be “the one plan to rule them all” — you set it up once and roam across borders without swapping.

Whilst I didn’t use this exact “global” plan on my Florida trip, the value and flexibility I experienced on my regional unlimited plan was great — so for a bigger multi‐destination travel this global version is compelling.

My experience with Simify 

My recent trip to Florida gave the perfect backdrop to test Simify’s unlimited North America eSIM (the “Unlimited Data — USA, Canada & Mexico – 30 days” plan) and see how it stands up when your days are full of roaming, streaming, mapping, and chasing sunshine.

What Went Really Well

• Install & landing-ready: Before boarding I installed the eSIM onto my unlocked phone. On arrival in Florida, I turned on mobile data, selected the eSIM as my data source, turned off the auto-data switch on the home SIM, and I was connected. Immediate freedom.
  
• Day-to-day performance: Between Miami beaches, Everglades day trips, checking wait times on roller coasters, and late-night Google Maps to pick up taco bell (don’t judge ;) ), the eSIM delivered. Speeds felt good and consistent, and I had no issues sending pictures to my sister in real time (I send her all my food pics lol), ringing Brad via Whatsapp to find him in the theme park when I’ve got lost from finding the toilet (true story), and researching where had veggie options!
  
• Unlimited feels real: The idea of “unlimited” meant I didn’t worry about daily data caps. I used my hotspot feature in the hotel, I updated social media, and I explored without needing hotel wifi. It was EXACTLY what I needed. I even had an airbnb stay that had no WiFi (I did not realise this when booking), but I needed to work, and thank gosh I had my eSIM, as I was able to hot spot my laptop and do some work!
  

Things to Be Aware Of

• “Unlimited” doesn’t mean every spot will be perfect: One important caveat — even though the data plan is “unlimited”, you’re still riding on the underlying networks (carrier partners) and remote / rural areas may have weaker reception. In Florida, when I drove into very remote Everglades stretches, the signal got patchy — expected, but worth flagging.
  
• Device compatibility & correct setup matter: I made sure my phone was eSIM-compatible and unlocked — highly important. You’ll need to double check this before your purchase.
  
• No local phone number / voice calls limitation: The plan is data-centric. If you rely on an outgoing local U.S. number or regular voice calls via the line, you’ll still need an alternate solution (VoIP, apps). I pretty much only use WhatsApp in my daily life anyway, so this isn’t a big deal to me as I was able to continue doing this with my eSIM.
  
• Hotspot usage and fair-use may apply: Even though the plan says unlimited, some fine-print and user remarks suggest heavy users might face throttling or network prioritisation in congested areas. For normal travel use it was fine for me, but if you’re streaming constantly or sharing to multiple devices it’s worth checking the terms.

Advantages of a Simify eSIM

1. Ultimate flexibility wherever your journey takes you

When you’re roaming from one country to the next, there’s no messy SIM card swap or hunting for a local outlet. With Simify’s eSIM, you activate digitally and land connected — it’s built for fluid travel. 

2. Hassle-free setup and quick start

You don’t need to wait for a physical SIM to arrive or dig out ejector pins at the airport. Simify emphasises ease and the setup process is relatively straightforward… in most cases… the entire setup takes less than 10 minutes.

3. Cost-effective data for travel-heavy usage

Especially when you’re using maps, uploading photos, streaming or hotspotting on the move, having a reliable unlimited-data plan shines. You don’t have to think about your usage when you’re on holiday, which really should be the last worry on your mind!

Disadvantages of a Simify eSIM 

1. Data-only & voice/text limitations

While Simify’s eSIMs shine for staying connected with data (maps, streaming, social uploads), many of their plans are data-only — meaning they don’t include a full outgoing local phone number, traditional voice calls or SMS under the same plan. This tends to be the same for *most* eSIM provider, so I kept my UK SIM live for calls/texts and used the Simify eSIM just for data — worth knowing, because if you want everything under one line you may need to pair up other services.

2. Coverage variability & “unlimited” caveats

Even though Simify offers “unlimited data” plans, “unlimited” does not always mean full-speed forever, everywhere. After a high-usage threshold (depending on country/plan) speed may drop, or service might use lower-priority network access.
Also, local network quality and coverage can vary. On my trip in Florida I mostly had strong performance, but I note that if you venture into very remote areas (or rely heavily on hotspot sharing/uploading) you’ll want to check local network bands and the fine-print of the plan. ‘Unlimited’ is a big plus for me, but it’s wise to temper expectations with real-world conditions.

Would I recommend Simify?

Yes, yes I would! 

I thought the pricing was good value for unlimited data, and I love the fact I was able to hot spot other devices (this is a big pro, other unlimited eSIM providers, such as Holafly, do not allow this). The set up was easy, the app is clean, and everything is just easy to use which is a big plus. 

Plus you can get a discount of 15% with the code DBTF15 which will make that pricing all the more sweeter! 

If you've got any questions about my experience, then drop them below!

Love,

Cazzy