You can’t make a phone call and they will just take your money.
Estimated from the grossing charts of Oct 25, 2026 in the 53 countries we track, and ratings growth on the App Store.
From our daily snapshots of every grossing chart.
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Measured from the store, not estimated.
From the latest 241 reviews on the United States App Store, Jun 20, 2016 to Oct 14, 2026: 39% are 1 or 2 stars. Open a theme to read what people wrote.
32 of the 1 and 2 star reviews.
★★★★★ You can't make a phone call and they will just take your money.
★★★★★ This company is a complete and utter scam and I would highly recommend that you go back to one of the big three and pay more money because these con artists aren't providing a service they're spreading fraud and…
★★★★★ I wasted time and money on a phone plan that barely worked.
23 of the 1 and 2 star reviews.
★★★★★ Terrible customer service, no solution to anything, I got a service with them and the eSIM doesn't even activate and they made me call to the support line and got not help
★★★★★ I call customer service and they tell me my phone number was not ported even though I made sure to do it the night before.
★★★★★ I just switched to Tello and this all is “fine” but nothing to write home about. However I have two things I want to write about today. 1) When this app is in a folder, iOS shows the light icon. But when the folder is…
22 of the 1 and 2 star reviews.
★★★★★ The rep tells me to go into my settings and reset my cellular network and of course I don't know the password to do that.
★★★★★ cannot login using email+password, only option is phone number and sms code
★★★★★ In some situations, the app appears to hang when managing account features or accessing calling functions.
11 of the 1 and 2 star reviews.
★★★★★ Unable to display some information, such as orders, personal info, etc. Connected to Wi-Fi but eSIM isn't working at the moment, so it may possibly have something to do with that. The information displays successfully…
★★★★★ Installed this service in December 2025 and now April 2026 still cannot access us calls and text with my ported number. Worked in the US but not in Portugal. Customer service try's to help but ALL calls made through…
★★★★★ Tello is a very bad cell provider and will offer you zero customer support. God help you if you lose your PIN code. Do not spend money with Tello, use Visable mobile instead
10 of the 1 and 2 star reviews.
★★★★★ I don't like limited Tello phone call plans, and they were unclear on how they work.
★★★★★ Don't get a limited gig data plan, run through the data in a couple of days and think they will help you out by letting you switch to the unlimited plan.
★★★★★ Is a fake ad they say with out extra fee to WiFi call, is impossible used WiFi call you need buy credits minimum 20 dollars and pay roaming if you are outside US….
10 of the 1 and 2 star reviews.
★★★★★ The Tello iOS application occasionally becomes slow, laggy, or unresponsive during use.
★★★★★ Very laggy app and bad or no customer service
★★★★★ I tried to port out my number. They are telling me to wait 3 to 7 business days. Every other company will do it the same day after activating my account. stay away.
9 of the 1 and 2 star reviews.
★★★★★ Update I have had service now for two weeks and two weeks and they tell me my unlimited Internet is out and all of my Internet services shut down immediately and won't run at all!
★★★★★ After update, unable log in.
★★★★★ ** UPDATE ** I decided to keep Tello despite having “No Service” in Japan because the WiFi Calling feature still works.
8 of the 1 and 2 star reviews.
★★★★★ The one thing a carrier app should do is impossible on their app rendering the entire thing USELESS (other than pissing me off to the degree that I'm switching carriers).
★★★★★ I've had Tello for over a year and don't use it much. However, I bought a new phone and needed to switch the ESIM to my new phone. Unfortunately, I didn't do that before setting up the new phone. Reaching this…
★★★★★ Didn't port number lost that and every time it renews subscription it takes them a week to figure out what went wrong.
26 of the 4 and 5 star reviews.
★★★★★ Good user interface with an app that is easy to manage, but the mobile service ultimately falls short where it matters most.
★★★★★ Just very affordable and easy to use.
★★★★★ Love it - easy to use, functional, reliable, and consistent.
18 of the 4 and 5 star reviews.
★★★★★ For the phone service, it continues to be affordable, though they recently they removed several useful usage, tiers that had made it much more flexible and worth the money every month.
★★★★★ Just very affordable and easy to use.
★★★★★ I love how cheap it is and how you can rollover data, as long as you pay the day before your auto deduction.
18 of the 4 and 5 star reviews.
★★★★★ Tello customer service, reception, speeds all fine.
★★★★★ This App is great but it would be even better if it could support more than one account.
★★★★★ I hope that Tello will one day offer support for Apple Watches.
12 of the 4 and 5 star reviews.
★★★★★ In those cases I can use My tello app for calls and that works great.
★★★★★ Coverage is amazing, speeds excellent (they seem not to throttle your video quality) I had YouTube on data saver mode but the video quality was automatically selected to 1080p on it's own (which is bad if you're on a…
★★★★★ Service works well, prices are good, and app works well.
8 of the 4 and 5 star reviews.
★★★★★ I still have fast internet service on my phone, I'm still able to text friends and family, and I just made my first phone call.
★★★★★ The service is fast and strong,I RECOMMEND TO EVERYONE.
★★★★★ The port in process was painless and fast.
Found by matching words and phrases in the reviews, not read by a person. A review can count toward more than one theme.
Latest reviews, United States App Store.
You can’t make a phone call and they will just take your money.
It would be nice to toggle between phone numbers on the app to view usage of each.
The absolute worst phone service available. Mind you, I’m using an IPHONE for this garbage on 5G. I’m done!
Guess what the incredibly helpful app does; it tells you that you can pay by CC or another method AND THAT'S IT. No place to enter said info, no link to a place where that can be accomplished, not even instructions that you need to go online. Just a window that looks like it has buttons but doesn't. The one thing a carrier app should do is impossible on their app rendering the entire thing USELESS (other than pissing me off to the degree that I'm switching carriers).
Terrible customer service, no solution to anything, I got a service with them and the eSIM doesn’t even activate and they made me call to the support line and got not help
I paid for the service last night installed the SIM, ported over my phone number, and when I wake up in the morning, I can’t make any phone calls and I have no Internet connection. I call customer service and they tell me my phone number was not ported even though I made sure to do it the night before. My previous cellular service ended last night so I can’t switch over my phone number. And I can’t make phone calls with the new number. The rep tells me to go into my settings and reset my cellular network and of course I don’t know the password to do that. Because who remembers that password? So now I have paid for a cellular service that I can’t even use and customer service is no help at all. I put in a service ticket and nobody has called me yet.. What a nightmare. run from the service. Run for your lives! Update I have had service now for two weeks and two weeks and they tell me my unlimited Internet is out and all of my Internet services shut down immediately and won’t run at all! This company is a complete and utter scam and I would highly recommend that you go back to one of the big three and pay more money because these con artists aren’t providing a service they’re spreading fraud and they’re getting away with the defrauding millions of people
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Released Oct 13, 2015. Current version shipped Oct 20, 2026.
Prices, ranks and reviews are per country. Revenue above is already worldwide.