# What Happens to a SEYFR File Transfer When Your Network Changes?

My workmate in Uganda sent me a video while I was on the road in Utah, USA. It was **221 MB**, and I was receiving it on my Android phone using SEYFR and mobile data.

I was walking toward the office. That gave me a simple test: what would happen to the transfer when my phone picked up the office Wi-Fi? And what would happen if I walked away and lost that connection?

So I recorded it.

## Watch the test

%[https://www.youtube.com/watch?v=Wf0IEV9Phvs]

[Watch the test on YouTube](https://www.youtube.com/watch?v=Wf0IEV9Phvs).

The video is 5 minutes and 29 seconds. Long waits and the store-search detour have been cut, and the retained footage plays at its original speed.

[Get SEYFR for your devices](https://seyfr.jitpomi.com/?utm_source=jitpomi_blog&utm_medium=owned_content&utm_campaign=network_conditions_file_transfer&utm_content=dev_team_samson_uganda_utah_network_changes_blog_2026_10_29_v1&utm_term=b30c82f8-49b7-4390-b053-f48743d6e35b).

## From mobile data to office Wi-Fi

At the start, the video was coming in over mobile data. My connection was slow. As I got closer to the office, the phone connected to its Wi-Fi, and the same transfer kept going.

I then turned off mobile data while the phone was on Wi-Fi. The download continued.

That was the first part of the test: changing the network connection during a transfer without starting the file again.

## Walking out of Wi-Fi range

Next, I walked away from the office. I wanted to get out of Wi-Fi range before the download finished.

Eventually, the Wi-Fi connection dropped. With mobile data still off, the phone had no connection for the transfer to use.

I turned mobile data back on and returned to SEYFR. **The transfer resumed from its previous progress.** It did not make me start the 221 MB file from the beginning.

I then headed back toward the office. I also wanted to finish this test before I used up my prepaid data plan. 😄

The video shows the file being received successfully at the end.

## A workmate in Uganda. A phone in Utah.

The sender was in Uganda throughout this test. I was receiving the file in the United States, moving between mobile data and office Wi-Fi.

We were not standing next to each other or sharing the same Wi-Fi network. The changing conditions were on my receiving phone as I walked.

That is the point of this recording: **even when network conditions change, file transfer continues.** When the connection was completely unavailable, the transfer had to wait. Once I restored a connection, it resumed.

## Why I wanted to show this

People move around while they work. You leave home, reach the office, lose a signal, or switch to mobile data. Sending a file should fit around that ordinary day.

This recording shows how SEYFR handled those changes on my Android phone in this test. It is the kind of practical behavior I want us to keep testing and improving.

I’m Samson Ssali, the person behind SEYFR. We’re building this for you, and your real experiences help us decide what to improve next.

[Download SEYFR and try it with your devices](https://seyfr.jitpomi.com/?utm_source=jitpomi_blog&utm_medium=owned_content&utm_campaign=network_conditions_file_transfer&utm_content=dev_team_samson_uganda_utah_network_changes_blog_2026_10_29_v1&utm_term=b30c82f8-49b7-4390-b053-f48743d6e35b).

**What usually happens when your connection drops during a file transfer?** Leave a comment, or send your feedback and feature requests to [dev@jitpomi.com](mailto:dev@jitpomi.com).