What is the expected return on investment for migrating 4G sites to own fiber? 
 we continue to roll out fiber. We're probably in the year three or four right now. We -- I would say with the majority or vast majority of all the 5G sites, they have our own fiber. We are migrating our 4G sites also, where it's a good return on investment to our own fiber. And over time, we will also open up opportunities for resell to our enterprise customers and wholesale.
So, I think that we are seeing that benefit already on the 5G build because we are using our own fiber. To get the full impact, we also have a couple of years left in order to have it in all the areas. But we are coming far away on the fiber build, and we will continue to do it where it makes sense for a return on investment. So, we feel really good about that, and that's part of our Verizon Intelligent Edge Network.
Brady Connor -- Senior Vice President, Investor Relations
Thanks, Phil. Brad, we're ready for the next question.
Operator
Thank you. The next question comes from Brett Feldman of Goldman Sachs. Your line is open.
Brett Feldman -- Goldman Sachs -- Analyst
Thanks for taking the question. I think you called out in the release that COVID ended up being a $0.02 benefit in the quarter. I imagine that was probably a mix of things that were good and bad. I was hoping you maybe could give us a little bit of insight into that.
And then the EPS guidance that you gave for this year, what are you assuming about the COVID impacts over the course of this year, if you could give us any insight on how that breaks out?
And then also one last question on guidance. Does that factor in any potential future spectrum purchases? Or does it just reflect the portfolio spectrum you have today? Thanks.
Hans Vestberg -- Chairman and Chief Executive Officer
I can start with the latter question, and Matt can come back to the first. So, when it comes to our guidance for EPS in 2021, of course, there are uncertainties of the pandemic and so on. But some things we know. I mean, the roaming charges will continue to be a headwind. We also think that as the pandemic and economic recoveries is coming back, probably latter part of '21, the public sector will not have an equally strong year as they had in 2020.
We also believe that SMB will continue to be subdued and have a challenge in '21. And as we saw during the full year, the switch pool has been lower due to the traffic in the stores, etc. So that's we have factored in.
But on the other hand, we have line of sight to what we're doing because we're executing on a strategy when it comes to migration of our customers, what we're doing in Verizon Business Group and also Verizon Media Group. As Matt said, I mean they were now, for the first time ever, have a year-on-year growth with 11%.
All in all, that is giving us the confidence that we can live up to this guidance. But there are some uncertainties and there are some headwinds from COVID, but we think that with those assumptions we have, we can actually do this.
And this is continued work with the EPS growth and acceleration that we have talked about for so many years right now, and we continue to show that we can do it with the assets we have and how we're executing. Matt?
Matthew D. Ellis -- Executive Vice President and Chief Financial Officer
Yes. Thanks, Hans. So, Brett, just in summary on the COVID assumption and the EPS guidance, I think I'd say while certainly some level of pressures will continue to exist on the business throughout the year, I would say it's -- we're not overly pessimistic, but we're not overly optimistic either. We assume some level of pressures. But you saw from the second half of the year, our ability to still execute within that type of environment.
In terms of the fourth quarter, as you say, there was actually -- the COVID impact was actually a $0.02 benefit. And what you saw there was there was a couple of one-timers, but primarily it was a case of the revenue pressures we saw declining versus what we've seen in 2Q and 3Q. You think media as an example, which had been significantly hit by COVID impacts earlier in the pandemic, but certainly
 we continue to roll out fiber. We're probably in the year three or four right now. We -- I would say with the majority or vast majority of all the 5G sites, they have our own fiber. We are migrating our 4G sites also, where it's a good return on investment to our own fiber. And over time, we will also open up opportunities for resell to our enterprise customers and wholesale.
So, I think that we are seeing that benefit already on the 5G build because we are using our own fiber. To get the full impact, we also have a couple of years left in order to have it in all the areas. But we are coming far away on the fiber build, and we will continue to do it where it makes sense for a return on investment. So, we feel really good about that, and that's part of our Verizon Intelligent Edge Network.
Brady Connor -- Senior Vice President, Investor Relations
Thanks, Phil. Brad, we're ready for the next question.
Operator
Thank you. The next question comes from Brett Feldman of Goldman Sachs. Your line is open.
Brett Feldman -- Goldman Sachs -- Analyst
Thanks for taking the question. I think you called out in the release that COVID ended up being a $0.02 benefit in the quarter. I imagine that was probably a mix of things that were good and bad. I was hoping you maybe could give us a little bit of insight into that.
And then the EPS guidance that you gave for this year, what are you assuming about the COVID impacts over the course of this year, if you could give us any insight on how that breaks out?
And then also one last question on guidance. Does that factor in any potential future spectrum purchases? Or does it just reflect the portfolio spectrum you have today? Thanks.
Hans Vestberg -- Chairman and Chief Executive Officer
I can start with the latter question, and Matt can come back to the first. So, when it comes to our guidance for EPS in 2021, of course, there are uncertainties of the pandemic and so on. But some things we know. I mean, the roaming charges will continue to be a headwind. We also think that as the pandemic and economic recoveries is coming back, probably latter part of '21, the public sector will not have an equally strong year as they had in 2020.
 We also believe that SMB will continue to be subdued and have a challenge in '21. And as we saw during the full year, the switch pool has been lower due to the traffic in the stores, etc. So that's we have factored in.
But on the other hand, we have line of sight to what we're doing because we're executing on a strategy when it comes to migration of our customers, what we're doing in Verizon Business Group and also Verizon Media Group. As Matt said, I mean they were now, for the first time ever, have a year-on-year growth with 11%.
All in all, that is giving us the confidence that we can live up to this guidance. But there are some uncertainties and there are some headwinds from COVID, but we think that with those assumptions we have, we can actually do this.
And this is continued work with the EPS growth and acceleration that we have talked about for so many years right now, and we continue to show that we can do it with the assets we have and how we're executing. Matt?
Matthew D. Ellis -- Executive Vice President and Chief Financial Officer
Yes. Thanks, Hans. So, Brett, just in summary on the COVID assumption and the EPS guidance, I think I'd say while certainly some level of pressures will continue to exist on the business throughout the year, I would say it's -- we're not overly pessimistic, but we're not overly optimistic either. We assume some level of pressures. But you saw from the second half of the year, our ability to still execute within that type of environment.
In terms of the fourth quarter, as you say, there was actually -- the COVID impact was actually a $0.02 benefit. And what you saw there was there was a couple of one-timers, but primarily it was a case of the revenue pressures we saw declining versus what we've seen in 2Q and 3Q. You think media as an example, which had been significantly hit by COVID impacts earlier in the pandemic, but certainly