Voip-Pal.com v. Verizon: VoLTE/VoWiFi Patent Suit Dismissed Without Prejudice
Voip-Pal.com asserted two IP-based voice-routing patents — US9179005B2 and US8542815B2 — against four Verizon entities in the Western District of Texas, targeting VoLTE and VoWiFi network services. The plaintiff voluntarily dismissed all claims without prejudice just 138 days after filing, before Verizon served any answer or dispositive motion.
Early voluntary exit before Verizon answered — but the door stays open
On May 30, 2024, Voip-Pal.com, Inc. filed a patent infringement action in the Western District of Texas (Case No. 6:24-cv-00299) before Judge David Counts, asserting US9179005B2 and US8542815B2 against Verizon Communications, Inc., Verizon Business Network Services, Inc., Verizon Services Corp., and Cellco Partnership (dba Verizon Wireless). The asserted patents cover network architectures that provide IP-based messaging and calling — specifically the VoLTE and VoWiFi capabilities central to modern mobile carrier infrastructure.
On October 11, 2024 — just 138 days after filing — Voip-Pal.com filed a Notice of Voluntary Dismissal under Federal Rule of Civil Procedure 41(a)(1)(A)(i), dismissing all claims against all Verizon defendants without prejudice. Because Verizon had not yet served an answer or a motion for summary judgment, the notice was self-effectuating, requiring no court order to take effect. The court confirmed termination on October 15, 2024, denied all pending motions as moot, and ordered each party to bear its own costs.
The 138-day duration is notably short and suggests the dismissal preceded substantive litigation — no claim construction, no discovery disputes, and no invalidity arguments appear on the public docket. The public record does not disclose whether the parties reached a private settlement, whether Voip-Pal.com identified a procedural deficiency, or whether it is repositioning to refile. The without-prejudice status is commercially significant: Voip-Pal.com retains the right to reassert both patents against Verizon or any other carrier in a future action.
Filing to Voluntary dismissal in 138 days
138 days — resolved well before the typical W.D. Tex. discovery close
Voluntarily dismissed without prejudice: what the terms mean for both sides
Rule 41(a)(1)(A)(i): self-effectuating dismissal, no court order needed
Federal Rule of Civil Procedure 41(a)(1)(A)(i) allows a plaintiff to unilaterally withdraw a case by filing a notice of dismissal before the defendant serves an answer or a motion for summary judgment. Because Verizon filed neither, Voip-Pal.com’s notice terminated the case automatically. The court’s October 15 order confirmed the termination but was not itself the operative legal act — the filing of the notice was.
Pre-answer voluntary exitClaims survive: Voip-Pal.com may refile against Verizon or others
A dismissal without prejudice does not adjudicate the merits and does not bar future litigation on the same patents. Voip-Pal.com retains the ability to reassert US9179005B2 and US8542815B2 against Verizon or any third party. This is legally distinct from a dismissal with prejudice, which would extinguish the claims permanently. The public record does not disclose whether a private settlement was reached alongside this dismissal.
Refiling rights preservedVerizon exits without an invalidity ruling — and without preclusion
Because the case ended before Verizon answered, no invalidity arguments, claim construction positions, or non-infringement defences were tested on the record. Verizon obtains no IPR estoppel protection, no judicial finding of patent invalidity, and no licensed status. The four Verizon entities face the same latent litigation risk from these patents as they did before this action was filed — the dispute is paused, not resolved.
No merits adjudicationVoLTE/VoWiFi operators remain exposed — patent enforcement cycle likely continues
Voip-Pal.com has a documented history of asserting its voice-routing patent portfolio against major carriers. A pre-answer voluntary dismissal without prejudice is consistent with a licensing negotiation pause or a strategic refiling in a different venue or against a different defendant. Carriers and OEMs deploying VoLTE or VoWiFi architectures should treat US9179005B2 and US8542815B2 as active enforcement risks and monitor for refiling activity.
Enforcement risk remainsFull party and counsel information
| Role | Name | Type | Detail |
|---|---|---|---|
| Plaintiff | Voip-Pal.com, Inc. | Company | VoIP patent licensing entity — holder of US9179005B2 and US8542815B2Search in Eureka ↗ |
| Defendant | Verizon Communications, Inc. | Company | Major U.S. telecommunications group operating VoLTE and VoWiFi network servicesSearch in Eureka ↗ |
| Co-Defendant | Verizon Business Network Services, Inc. | Company | Search in Eureka ↗ |
| Co-Defendant | Verizon Services, Corp. | Company | Search in Eureka ↗ |
| Co-Defendant | Cellco Partnership, (dba Verizon Wireless) | Individual | Search in Eureka ↗ |
| Plaintiff counsel | Lewis E. Hudnell, III. | Attorney | Counsel for Voip-Pal.com, Inc.Search in Eureka ↗ |
| Plaintiff law firm | Hudnell Law Group PC | Law Firm | Representing Voip-Pal.com, Inc.Search in Eureka ↗ |
| Defendant counsel | Deron R. Dacus | Attorney | Counsel for Verizon Communications, Inc.Search in Eureka ↗ |
| Defendant law firm | The Dacus Firm PC | Law Firm | Representing Verizon Communications, Inc.Search in Eureka ↗ |
| Presiding judge | Judge David Counts | Judge | Texas Western District CourtSearch in Eureka ↗ |
Official order — verbatim text
The court’s order confirms the dismissal was self-effectuating under Rule 41(a)(1)(A)(i) — legal termination occurred at the moment Voip-Pal.com filed its notice, not upon the court’s October 15 order. The without-prejudice qualifier is outcome-determinative: neither US9179005B2 nor US8542815B2 was adjudicated on validity or infringement, and no findings bind either party in future proceedings. The cost-neutrality order — each party bears its own fees — is consistent with an early, undisputed procedural exit rather than any negotiated or litigated resolution.
US9179005B2 & US8542815B2 — IP-based voice routing for VoLTE and VoWiFi
US9179005B2 (application No. US13/966096) and US8542815B2 (application No. US12/513147) both relate to network systems that route voice and messaging traffic over IP infrastructure — the foundational architecture enabling Voice over LTE (VoLTE) and Voice over WiFi (VoWiFi) services. These technologies allow carriers to deliver high-definition voice calls and messaging through packet-switched IP networks rather than traditional circuit-switched lines, and are embedded in virtually every modern 4G and 5G mobile network deployment.
For telecommunications carriers and equipment vendors, these patents represent a strategic enforcement risk across a broad swath of network infrastructure. VoLTE is now the baseline voice standard on 4G LTE networks globally, and VoWiFi is increasingly mandated for indoor coverage. Any vendor supplying IMS core components, session border controllers, or VoLTE/VoWiFi client stacks — and any carrier operating such services — sits within the apparent scope of Voip-Pal.com’s enforcement campaign. The portfolio’s continued without-prejudice status elevates this risk for the entire carrier ecosystem.
Should you run an FTO against US9179005B2 and US8542815B2?
Any organisation deploying, supplying, or licensing VoLTE or VoWiFi technology — including mobile network operators, MVNOs, IMS platform vendors, and handset OEMs integrating voice-over-IP stacks — should assess freedom-to-operate against these two patents and their broader family. The without-prejudice dismissal against Verizon leaves both patents fully enforceable, and Voip-Pal.com’s history of multi-defendant carrier litigation suggests continued assertion activity is likely.
PatSnap Eureka’s FTO Search Agent can map the full claim scope of US9179005B2 and US8542815B2, identify all family members and pending continuations, and surface prior art that may support design-around or invalidity arguments. For R&D and product teams building next-generation IMS or VoWiFi architectures, running an Eureka FTO analysis before product launch is materially lower cost than defending a patent assertion after commercial deployment.
Run a freedom-to-operate analysis on US9179005B2 to assess your product’s exposure
Run FTO in Eureka →Similar VoLTE and VoWiFi patent infringement cases in W.D. Texas
Explore related IP-based voice routing patent disputes filed in W.D. Texas and other federal courts involving VoLTE, VoWiFi, and IMS network architecture claims.
What this case signals for the VoLTE/VoWiFi IP enforcement landscape
A pre-answer dismissal without prejudice rarely closes a patent dispute — it often resets the clock for a more targeted second attempt.
Without-prejudice dismissal keeps litigation pressure alive for all carriers
Voip-Pal.com’s exit before Verizon answered means no prior art, invalidity, or non-infringement findings exist on the record. Any carrier operating VoLTE or VoWiFi infrastructure should treat this dismissal as a deferral, not a resolution. Portfolio monitoring for continuation filings from US9179005B2 and US8542815B2 is commercially prudent.
W.D. Texas pre-answer dismissals: watch for refiling in different venues
Patent plaintiffs using Rule 41(a)(1)(A)(i) sometimes refile in a different district — or against a different defendant within the same carrier group — to test claim scope or secure more favourable scheduling orders. The cost-neutral outcome here (each party bears own fees) is consistent with an agreed pause rather than a litigated defeat, suggesting a refiling is plausible.
Voip-Pal.com v Verizon — key questions answered
Voip-Pal.com filed patent infringement claims against four Verizon entities in the Western District of Texas on May 30, 2024, asserting US9179005B2 and US8542815B2 over VoLTE and VoWiFi network services. On October 11, 2024, Voip-Pal.com voluntarily dismissed all claims without prejudice under Rule 41(a)(1)(A)(i). The court confirmed termination on October 15, 2024. Each party bears its own costs.
A dismissal without prejudice means the merits of the infringement claims were never adjudicated. Voip-Pal.com retains the legal right to refile claims based on US9179005B2 and US8542815B2 against Verizon or any other party. Neither patent was found invalid or not infringed, and no findings from this case would bind the parties in future litigation.
The public record does not disclose the reason. A pre-answer voluntary dismissal under Rule 41(a)(1)(A)(i) is procedurally available as of right and requires no court approval. It is consistent with ongoing licensing negotiations, a strategic decision to refile in a different venue, or identification of a procedural issue — but no agreement or explanation is on the public docket.
Four Verizon-affiliated entities were named: Verizon Communications, Inc.; Verizon Business Network Services, Inc.; Verizon Services Corp.; and Cellco Partnership, doing business as Verizon Wireless. All four were dismissed simultaneously under the same voluntary dismissal notice filed October 11, 2024.
Both patents cover IP-based network architectures for routing voice calls and messages — the technology underlying VoLTE and VoWiFi services. Mobile network operators, MVNOs, IMS platform and session border controller vendors, and handset OEMs integrating VoIP stacks are all potentially within the enforcement scope of these patents. Given Voip-Pal.com’s history of multi-carrier litigation, organisations in this space should monitor for refiling activity.
PatSnap Eureka searches patents and litigation data to answer instantly.