slynumber.com

2.9
2.9 Based on 56 reviews

SLYNUMBER is the easiest way to add a second mobile number to your phone - no SIM card or new device is needed....

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Average Rating

2.9

/
5

56 Reviews

5 Star
45%
4 Star
0%
3 Star
2%
2 Star
4%
1 Star
50%

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Justin Schweitzer
One of the most frustrating apps I've…

One of the most frustrating apps I've ever had the displeasure of using.NOTHING works on the iOS app. COMPLETELY horrible design and implentation, incredibly frustrating.

1
Date of experience: Oct 20, 2025
Thom Richards
App does not work, will not refund, service non-existant

App does not work, emailed in October asking to cancel the subscription, no response to multiple emails - had to escalate a dispute with AMEX just to get funds back.DO NOT USE AT ANY COST

1
Date of experience: Oct 14, 2025
Chase Stover
Awesome assistant from slynumber

After arising unexpected error on my PC, I lost my slynumber, and I send email to need urgent help.In 10 mins, Slynumber recover my phone number.I really appreciated its assistance and kindness.

5
Date of experience: Oct 13, 2025
Bruce Clark
I encourage you to complain to the FCC @ (888) 225-5322

While I had the service good. Trying to port my number away and 4 days with no response from customer service. I see others have said the same thing when it comes to porting, which is illegal. According to FCC regulations, carriers are required to process simple porting requests within one business day. I will be contacting FCC and encourage anyone who has this issue to do the same thing. Enough complaints, hopefully they will launch an investigation. Further, I attempted to call them, only to find that they do not offer a customer service phone number. I find it ironic, and frankly unacceptable, that a company selling phone services does not provide phone support.

2
Date of experience: Oct 12, 2025
Martin Marin
Reliable service and helpful support

I was having trouble sending messages, but the SLYNUMBER support team guided me step by step and quickly helped resolve the issue. The app works smoothly for receiving and sending messages once set up correctly. Great service and responsive support team — thank you!

5
Date of experience: Oct 03, 2025
CM She
Message Failure - no support

I have been using SLYNUMBER for my personal and business communications, and the service has effectively been unusable for over a month.In mid-October the app started logging me out automatically every day, which caused me to miss an emergency call even though my phone and Wi-Fi were working normally. A few days later, all of my messages disappeared and I stopped receiving any new ones.Since then I have repeatedly contacted support, followed every instruction (log out/in, uninstall/reinstall, check notifications, send diagnostic files and screenshots), and sent multiple “ESCALATE” emails as requested. I have attached the same diagnostic file several times and clearly explained that no messages appear in the app even when notifications arrive.Despite this, I keep getting generic replies asking me to explain the issue again, which makes it clear that my previous messages and attachments are not being properly reviewed. As of mid-November, I still have no access to my message history and still cannot reliably receive new messages.Losing a month of communications and having such poor follow-through from support is unacceptable for a service that is supposed to handle phone and text communication. Based on my experience, I cannot rely on SLYNUMBER for anything important.

1
Date of experience: Oct 01, 2025
Alexis Valderrama
Problem was solve immediately

Problem was solve immediately I just send an email and in matter of seconds everything solve and very friendly.Shout to Dee, Amazing service

5
Date of experience: Sep 29, 2025
Dijital marketing
SLYNUMBER is a great service

SLYNUMBER is a great service, I searched many other alternatives and used some of them but they are the fastest and most trustable till now.Support also very fast, which is important for me.

5
Date of experience: Sep 29, 2025
Dawn
Customer service is very responsive

Customer service is very responsive and resolved my issue so fast. That really means something! This company really cares about their customers and they really want to make their product the best for their customers.

5
Date of experience: Sep 25, 2025
Nice services.

5
Date of experience: Sep 25, 2025

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