Reviews for SLYNUMBER

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20 reviews

Review by Rob G
(1/5) June 16, 2023

App does not work. I was unable to make outbound calls, even after paying an extra $10 for extra outbound calls/texts. I emailed Customer Service twice and didn’t receive a response. Beware!

Review by John Love
(1/5) June 11, 2023

Seems like a cash grab! I had 8 dollars and change balance but software went blank when trying to make a call. I contacted customer support. Next thing I know account balance, phone number and subscription all vanished!

Review by Kyle Anderton
(5/5) January 4, 2024

Fantastic customer service! I used this app for a second number on my business phone so I can have my personal number with me. It’s so intuitive. The app works so well. I did not realize you had to pay the credits for outgoing calls and texts. However, overtime this me have me choose a […]

Review by Titan Cameraman
(1/5) June 1, 2025

trying to use this app but I can’t get past the area code screen, and no I’m not paying.

Review by Laurie Letchworth
(2/5) October 24, 2024

This is a good app but needs lots of upgrade. when a calls comes through , it would not pop up from background. Call logs is not always updated. You cannot call directly call back a missed call numbers from call log. All these needs to be fixed.

Review by John Cunningham
(1/5) December 9, 2023

Signed up for a trial subscription. Went to renew but barely missed the cutoff time. I asked support if they could revive my number. No response. 8 days later, slynumber charged my credit card. Emailed slynumber twice requesting a refund or to revive my number. No response. Left a voice mail with mobile-sphere. No response. […]

Review by Queen OfASMR
(1/5) April 1, 2025

my experience was a terrible one, I was charged every time someone called me on my sly number. When I decided to cancel my subscription I was still being charged even though I did not have an account with Sly anymore, trying to resolve the issue with Sly for charging me even though my account […]

Review by Boris Krasniansky
(1/5) March 13, 2025

I subscribed to the service under the impression that it worked with WhatsApp, but I later found that this was not the case. I requested a refund within an hour, as their policy states refunds are available within 24 hours. However, I received a response three days later stating that I was not eligible. I […]

Review by Jesse Cota
(1/5) September 12, 2024

Utter garbage. Paid the 8.99, waste of money. Has a search bar for messages, that doesn’t search messages! Will only locate a contact name. Useless. Could have hundreds of customers and need to locate their address or any other pertinent info within messages, and can’t do it. Again useless. Waste of money but won’t get […]

Review by Jeff G
(1/5) April 30, 2024

I wish I could give less than 1 star. DON’T WASTE YOUR MONEY OR TIME. It hasn’t worked correctly from the start. Can’t answer incoming calls, and their customer service makes Xfinity look excellent. When I did make calls the sound clarity was so poor, that I couldn’t understand the person on the other end. […]

Review by Chris
(1/5) April 10, 2023

I am extremely disappointed with this app, as I spent $30 on an annual subscription only to find out that purchasing additional credits is also necessary. Unfortunately, this information was not clearly mentioned before making the payment. I feel misled and would like a refund; otherwise, I will have no choice but to contact my […]

Review by Christoper Freidkin
(1/5) July 10, 2025

My messages are not delivered to the receiver. I tried texting my friends and sister while seating beside me, messages never delivered to their phone. ‎They texted this number but theirs delivered into slynumber. I think it is a very bad thing for your service not to work well since it is a paid service […]

Review by Agustin ER
(1/5) May 30, 2025

Google Voice is only paid. On ipqualityscore it shows as voip Singapore,although I ordered a number of the United States! Banks and other financial institutions will refuse you. I have a number with froudscore 70, so someone used it. Wasted money

Review by Murray G.
(1/5) May 22, 2024

Update: may 22, 2024 – two huge issues. First, when I receive a text message, it shows up in the Android message notification, but almost never shows up in the slynumber app – so there is no way to read it. On web portal, messages area shows “internal server error”. Worse, support is non responsive. […]

Review by Annete Kurz
(5/5) July 30, 2025

Their support helped me after I had some issues with setting up my phone number again.

Review by Donnie Harbert
(1/5) July 21, 2025

Poor customer service and they attempt to charge you even though you don’t have an active number. When you contact customer service, they say you have an active account yet you can’t enter the mobile app and delete it or cancel it. poor design, poor function, and poor customer service.

Review by Tim Lyon
(1/5) September 11, 2025

I AM SO ANGRY. I purchased a specific phone number and had it transferred and parked at Slynumber because that specific number had a special meaning. I tried getting texting to work and had an issue and WITHOUT ASKING FIRST, they TOOK AWAY MY NUMBER AND GAVE ME A NEW ONE. I understand that they […]

Review by Nitin Verma
(1/5) October 10, 2025

The subscription amount has already been charged from my account, but when I open the SLYNUMBER app, it still shows “no number”. I’ve already checked my Google Play subscriptions — it’s active and payment went through successfully. Kindly help me restore or activate the number on my account as soon as possible. I’ve also attached […]

Review by J B.Z. (Pand3m1x)
(2/5) June 9, 2025

constant glitches, like when answering the phone. Wouldn’t connect, and lost the phone call, despite it being from the PA state office. it’s hard to tell if it’s just not connecting to my wifi (I currently have a Google Pixel 9a). Not having this issue with other communication apps. I’m at a loss of what […]

Review by Ms K
(3/5) August 16, 2025

It worked for a while, however. I have had issues for months. Customer service used to try to help but have become useless as they just ghost you when there is an issue. Update: I received no communication but the issues are resolved and things seem to be working again. I would give a higher […]