J1Sims Review: Read This Before You Buy Their Unlimited Plan
I'm in the US for the summer on a J-1 visa. Before the season started I needed a US number with data, and j1sims.com is one of the first things you find when you search for SIM cards for J-1 students. The site looked fine, the plan said unlimited, so I paid. I didn't think to check Trustpilot before buying, which was my mistake. Only after everything went wrong did I look, and found they sit at 1.8 out of 5 with most reviewers describing the same things that happened to me. Everything below is documented with screenshots and the full email chain.
What I bought
On June 9 I paid $53 through their checkout. The normal price is $63, that's the $43/month Premium plan plus a $20 activation fee, and I had a $10 code from my sponsor. The receipt reads "SIM Activation - Premium - 3 months".
Their pricing page is actually honest about the cheap plans. Basic is "1GB high-speed 4G LTE, then unlimited 2G". Standard is "4GB high-speed 4G LTE, then unlimited 2G". Premium just says "unlimited 4G LTE data". No cap, no throttling note, no fine print. That one sentence is the reason I picked Premium.
Activation took a day
The site promises eSIM details by email within 24 hours. The next morning I asked if everything was on track and got an apology about "delays with the activation process". The eSIM came later that day. Not a disaster by itself, I only mention it because it fits the rest of the story.
Day three: 58 kbps
I use a lot of data and I had gone through about 15GB by the evening of June 11, when everything stopped. Web pages would not open at all. A speed test showed 58 kbps, which is 2G territory, the exact thing the two cheaper plans advertise. Messaging apps still worked because text needs almost no bandwidth. At 3 in the morning I emailed them asking if there is a cap on the unlimited plan.
"Set up incorrectly"
The reply came at 4:23 AM:
"Upon review, we found that your plan was set up incorrectly. We will correct this error in the next few hours to restore your service."
Fast answer, I'll give them that. What "incorrectly" means was never explained. A line that runs at full speed for 15GB and then drops to 2G behaves a lot like their cheaper plans wearing a Premium price tag. That last sentence is my guess, not something they confirmed.
The fix was a different carrier
At 8:27 AM they sent a QR code for a new eSIM, same phone number, with this instruction:
"Please ignore any messages you receive from Cricket; these are related to how we manage your service."
My old eSIM had been running on Verizon's network. I deleted it, scanned the new one, and my phone now said Cricket Wireless. So J1Sims has no network of its own. It buys plans from regular carriers, resells them with a markup, and would prefer that you don't read what the actual carrier sends you. For comparison, Cricket sells its own unlimited plans starting around $35 to $55 a month, in real stores, with real support. Speeds were back to normal before noon. In total I spent around 14 hours at 58 kbps, most of it overnight, so the practical damage was small. The response time was genuinely quick.
Then the hotspot was gone
With the new eSIM, Personal Hotspot on my iPhone turned grey and untappable. I asked whether the Premium plan includes hotspot. The answer:
"Hotspot is not included in the plan. You can enable it for $10/month"
followed by a link to a cricketwireless.com login page where I could buy the add-on myself. The same Cricket whose messages I was told to ignore. The word hotspot does not appear anywhere on the J1Sims site, neither as included nor excluded. You find out the real shape of the plan after you have paid. A lot of J-1 workers share housing and rely on tethering, so for many people this alone makes the plan useless.
The refund conversation
I asked for my money back since the service didn't match the advertising. Their position was that because they corrected the setup error after I reported it, "we have fulfilled the service as advertised", so no refund. They did confirm my cancellation in writing and promised no further charges, and so far none have appeared.
What the reviews say
After all this I finally checked Trustpilot, where J1Sims has a 1.8 out of 5 rating. The complaints repeat: people handed over to a different carrier without being told, throttling explained away as "data prioritisation", refunds refused despite a stated trial policy, and customers left without a working phone partway through their plan. In other words, what happened to me is not a one-off. I just hadn't looked before I paid.
Is J1Sims a scam?
Depends on your definition. I received a working SIM, my emails were answered within hours and the cancellation was honored, so it isn't theft. My opinion after going through all of it: you pay a markup to a middleman for a plan whose limits are written nowhere, your line can be moved to a different carrier overnight with a QR code and a request to ignore that carrier's messages, and when the product doesn't match the ad, the refund answer is no. Whether you call that a scam or just a bad deal is up to you. I switched away after three days.
What to get instead
You do not need a special J-1 SIM. US prepaid carriers don't ask for an SSN or credit history, just a payment card, and they activate over eSIM in minutes. What I found while fixing this mess:
- Visible (runs on Verizon): $25/month with no data cap at all, $35 and $45 tiers if you need hotspot. This is what I use now.
- US Mobile: from $25/month, you choose Verizon, AT&T or T-Mobile and can switch between them.
- Cricket directly: if you're going to end up on Cricket anyway, buying from Cricket gets you the same network plus stores you can walk into.
All of these cost the same or less than the $43 a month plus $20 activation that J1Sims charges.
Every quote above comes from emails I received from J1Sims support or from j1sims.com as it appeared when I purchased. I keep the screenshots and the full email chain. If J1Sims disputes any fact here or changes its plans, I will update this post and mark the change.
Published 2026-06-13 by Saytto