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Hybrid networks, tighter budgets: two signals reshaping how operators plan their core
Two developments in the mobile industry, taken together, say something important about where networks are heading — and about the decisions operators will face sooner than they think. One is about how coverage will be delivered. The other is about how it will be paid for. Both point to the same conclusion about the network core.
The biggest operators just validated the hybrid network
AT&T, T-Mobile and Verizon — fierce competitors on every other front — announced a joint venture to eliminate wireless dead zones across the United States through satellite Direct-to-Device (D2D) services. For the first time, the three largest US mobile operators are pooling spectrum resources and aligning on common technical specifications to build a shared, technology-neutral platform that multiple satellite providers can plug into.
The significance goes well beyond the US market. When operators of that scale agree that the future of connectivity is hybrid — terrestrial and non-terrestrial networks working together, on open, standards-based platforms — it stops being a prediction and becomes a direction.
For operators everywhere, and especially those serving islands, rural regions and dispersed geographies, the practical consequence is that coverage strategies are diversifying. The days of a single access technology covering an entire footprint are ending. Satellite D2D, fixed wireless, private networks and traditional mobile access are increasingly expected to coexist under one subscriber experience — one identity, one policy, one set of services, regardless of how the device happens to be connected at that moment.
That is a demand on the core, not just the access layer. The network functions that manage subscribers, sessions and policy need to interwork cleanly with access types that may not have existed when they were first deployed. A core built as a closed, monolithic system struggles here: every new access partner becomes an integration project, every new roaming model a negotiation with the original vendor's roadmap. A modular core, designed from the start for interworking and multivendor environments, absorbs these additions as ordinary evolution rather than disruptive re-architecture. The satellite JV is a headline today; for most operators the real question is whether their core will treat the next access technology as a plug-in or a rebuild.
Tighter budgets make architecture decisions matter more
The second signal is less dramatic but just as consequential: analysts are predicting a slowdown in telecom spending. Dell'Oro Group forecasts worldwide telecom capex to decline 2% in 2026, growing at only around 1% CAGR through 2030 as the peak of 5G rollouts passes. Operators will keep investing — connectivity demand isn't going anywhere — but they will invest more selectively, with sharper scrutiny of every project's risk, return and timing.
In that environment, the cost of a wrong architectural bet grows. Large rip-and-replace programs, already disruptive, become far harder to justify to a finance team asking why the whole core must be replaced to modernize one capability. Long, all-or-nothing modernization cycles carry exactly the kind of execution and budget risk that gets projects paused.
What gains value instead is optionality: the ability to evolve the network one step at a time. Modernize the components that genuinely need it, keep the ones that still perform, and avoid paying today for capabilities the market isn't ready to monetize yet. This is where self-paced evolution stops being an engineering preference and becomes a financial strategy. A modular architecture lets an operator sequence its spending to match its business — introducing new functions as revenue justifies them, spreading risk across smaller and reversible steps, and never being forced into a large capital outlay just to unlock a single improvement. When budgets tighten, the network that can be upgraded in pieces is the network that keeps getting upgraded at all.
What connects the two
Hybrid networks demand interworking. Budget pressure demands evolution without disruption. Two different headlines, one common conclusion: the operators best positioned for the next five years are the ones whose core network keeps their options open — technically and financially.
That conviction is why Summa Networks builds its Full Core for Mobile, IoT and Private Networks as a modular, flexible platform. Operators choose the components they need, integrate them into multivendor environments, and evolve at their own pace — protecting the investments they have already made while staying ready for the technologies, partners and business models still to come.
The week's news didn't change our view. It confirmed it.
Summa Networks provides modular Full Core solutions for Mobile, IoT and Private Networks, trusted by more than 40 clients in over 30 countries.
Sources:
- AT&T, T-Mobile and Verizon joint venture on satellite Direct-to-Device services — AT&T Newsroom, "AT&T, T-Mobile, and Verizon Plan to Launch New Joint Venture" (May 14, 2026): https://about.att.com/story/2026/new-joint-venture.html — and GSMA, "Major US Carriers Band Together in Joint Venture to Encourage D2D Competition" (May 21, 2026): https://www.gsma.com/solutions-and-impact/technologies/networks/latest-ntn-news/major-us-carries-band-together-in-joint-venture-to-encourage-d2d-competition/
- Worldwide telecom capex to decline 2% in 2026 (1% CAGR through 2030) — Dell'Oro Group, "Worldwide Telecom Capex to Decline in 2026" (April 2, 2026): https://www.delloro.com/news/worldwide-telecom-capex-to-decline-in-2026/
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