Verizon users are reporting the return of SOS mode on their phones.

On Saturday, a software issue at Verizon caused a core network disruption, disconnecting thousands of subscribers from the wireless network. The outage also caused many iPhone users to go into SOS mode, which prevents users from making calls or using data, but allows quick contact with emergency services. Verizon announced that the problem that began Saturday afternoon was fully resolved slightly after midnight.

However, social media posts suggest the issue may not have been completely fixed on Saturday. One Verizon customer posted on social media on Sunday afternoon that they were experiencing the SOS no service alert again after believing it had been resolved. They expressed frustration with the service disruption for two consecutive days and considered switching carriers.

Verizon customers are upset about the inability to connect and the recurrence of the issue. There are complaints on social media about both the wireless service and Verizon's customer service.

One customer reported being hung up on repeatedly when calling customer service and not reaching a real person. They said a callback resulted in being hung up on.

Some Verizon customers who depend on their smartphones for work were also affected. One customer was unable to activate a new phone because of the outage. The customer's old phone was deactivated when Verizon attempted to convert the embedded SIM, leaving them without cellular service.

Smartphones are essential, and service disruptions can cause significant problems. One Verizon subscriber reported that their mother needed an ambulance, but 911 calls would not go through. Emergency calls should be functional even during an outage.

One Verizon customer was advised by the Verizon app to restart their phone. After doing so, the customer and their daughter were able to make calls. A customer in Chicago requested a callback, asked for compensation, and received a $20 credit.

Some customers switched from Verizon for reasons other than the outage. One customer stated they switched to AT&T and would save about $80 per month with new phones.

With Verizon facing negative publicity from the outage and T-Mobile dealing with controversy, AT&T may benefit. If the outage issues are not resolved quickly, Verizon could see increased customer churn.

In other news, "Iconic Phones: Revolution at Your Fingertips," a coffee table book about the technological revolution of the 21st century, will be released in a few months.