Khaled Md Tuhidul Hossain

Khaled Md Tuhidul Hossain

Software engineer and founder

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Maker History

  • ONE eSIM
    ONE eSIMLand in any country, you are already connected.
    Nov 2026
  • Zephy Phone
    Zephy PhoneEmpower your business with affordable global calling.
  • 🎉
    Joined Product HuntAugust 14th, 2024

Forums

ONE eSIM Store: The same reliable travel eSIMs, lower prices, and worldwide coverage.

Hey Product Hunt!

I'm Khaled, and I built One eSIM.

I travel a lot, and over the years I've used A**, H**, and several other eSIM apps. They all worked, but I kept noticing something: they sell data on the same local networks at very different prices.

Sometimes I paid almost 40% more for the same plan simply because of which app I opened first.

ONE eSIM - Land in any country, you are already connected.

Prepaid travel eSIM data plans for 200+ destinations. Install before you fly, switch on when you land. No roaming bills, no SIM swap.

ZephyPhone — the international calling app, now on iPhone

Hey Product Hunt
I'm Khaled, maker of ZephyPhone.
We launched ZephyPhone as a web app a while back, with one promise: crystal-clear international calls to 200+ countries from $0.019/min, no contracts, no monthly fees.
At the start, it was people like me : expats, calling parents, grandparents, siblings. The kind of calls you don t want dropping halfway through.
Then something unexpected happened:
1. Small business owners doing marketing calls.
2. A freelancer in Manila calling clients in London.
3. A founder in Singapore running a remote team across time zones.
5. An entrepreneur from Bali talking with investors in Canada.
Turns out, international calling cost is a hidden startup expense and we were quietly solving it.
Then came digital nomads. People tired of switching SIM cards every month. Tired of getting hit with roaming charges.
ZephyPhone just worked Lisbon, Bali, Mexico City, London, Estonia, Berlin . One app. One balance. Anywhere.
But there was one message I kept getting:
This is great on my laptop but when is the phone app coming?
Which is Fair.
Nobody wants to open a browser just to call their mum, client, or peers. So we built it.
Today, we re launching ZephyPhone for iPhone on the App Store with same rates, same HD quality, now in your pocket. Tap a contact and call. No SIM swaps. No porting. No monthly bills.
Huge thank you to everyone who asked for this , you made it happen.
Everyone signup and get your free call.
Android is next.

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