DataJack sold prepaid, no-contract mobile broadband through USB modems and Wi-Fi hotspots. It had no phone service. Quamtel bought DataJack in 2010 and later took the DataJack name. In 2014 the company merged with TelBill, sold its subscriber base and was renamed Unified Signal on November 27, 2014.
DataJack was acquired
On June 4, 2014, DataJack, Inc. completed a merger with TelBill Holdings. For accounting purposes TelBill was the acquirer. The combined company then sold the acquired subscriber base for working capital, according to its fiscal 2014 10-K. It dropped the DataJack name on November 27, 2014, becoming Unified Signal, a billing software company for resellers. The filing does not name the buyer of the subscribers.
If you had a DataJack line
DataJack was data-only, so most lines had no phone number to port. Its subscriber base was sold in 2014, but the 10-K does not name the buyer. The datajack.com domain now redirects to a domain-sale listing. If you still have a DataJack device, it will need a new data plan from a current carrier.
The 10-K does not name who bought DataJack’s subscribers, and host network reports differ: Sprint in 2012, T-Mobile and Verizon on Wikipedia.
How DataJack ended
- January 3, 2010: Quamtel completes its acquisition of DataJack, a 3G mobile broadband provider.
- April 10, 2012: DataJack expands its multi-year MVNO deal with Sprint for prepaid 3G mobile broadband.
- June 4, 2014: DataJack, Inc. completes its merger with TelBill Holdings, which is the accounting acquirer.
- 2014: The combined company sells the acquired subscriber base for working capital.
- November 27, 2014: DataJack, Inc. is renamed Unified Signal, Inc.
Why DataJack ended
The company’s fiscal 2014 10-K says the legacy business was losing over $100,000 per month. After the TelBill merger, the combined company folded the legacy code into the Unified Signal platform and sold the subscriber base to raise working capital. It then repositioned as a software billing and back-office provider for other wireless resellers instead of selling mobile broadband under its own brand.
How to find who holds an old number now
- Check an old bill or payment record. It names the company that billed you last.
- Run the number through a carrier lookup tool. It shows the carrier that holds the number today.
- Call that carrier and ask for the account number and transfer PIN.
- Start the port from the new carrier. Never cancel the old line first.
Your right to keep a number
Number portability is federal law, not a carrier policy. The rule is the FCC’s: Portability: Keeping Your Phone Number When Changing Service Providers.
How we verified DataJack
BestCellular.com tracks active carriers and defunct ones. We keep both, because people still search for brands that no longer exist. Every fact on this page comes from the sources listed below, and we leave a detail out when no source states it. Where sources disagree, this page says so. If you can document a correction, tell us and we will check it against the sources.
Tracked and active are different counts on this site. DataJack counts in our tracked total, not in our active total, so it does not appear in tools built for live carriers.
Questions about DataJack
Is DataJack still available?
No. The company behind DataJack sold its subscriber base in 2014 and renamed itself Unified Signal on November 27, 2014. The datajack.com domain now redirects to a domain-sale listing, not a service.
Which network did DataJack use?
Sources differ. Light Reading reported in April 2012 that DataJack ran on Sprint’s 3G network. Wikipedia lists T-Mobile and Verizon as its hosts, and the company’s 10-K says it integrated with all major US carriers.
What happened to DataJack customers?
The fiscal 2014 10-K says the combined company sold the acquired subscriber base to raise working capital. It does not name the buyer or the date, so where DataJack customers ended up is not stated in the sources.
Did DataJack have phone service?
No. DataJack sold data-only, prepaid mobile broadband through USB modems and a Wi-Fi hotspot that could connect up to 8 devices. Wikipedia lists its phone service as No and modem service as Yes.
Sources
Checked October 13, 2026.
- SEC EDGAR: Unified Signal, Inc. Form 10-K, fiscal 2014: Filed 2015. Name DataJack, Inc. until Nov 27, 2014; TelBill merger June 4, 2014 (TelBill the accounting acquirer); ‘sold the acquired subscriber base’.
- Tech Monitor: QuamTel completes DataJack acquisition: Jan 3, 2010. DataJack became a wholly owned QuamTel subsidiary; sold 3G USB modems.
- Light Reading: Sprint, DataJack Expand MVNO Deal: April 10, 2012. DataJack, a Quamtel subsidiary, sold prepaid 3G mobile broadband on Sprint’s network.
- Wikipedia: List of mobile virtual network operators in the United States: Mobile broadband table lists DataJack hosts as T-Mobile and Verizon, phone service No, modem service Yes.
Best Cellular. “DataJack: What Happened,” BestCellular.com. https://bestcellular.com/datajack-quamtel-inc/
Free to reuse with credit. Licence, sources and the full dataset. All defunct carriers are listed on carriers that shut down.