68/100IFR Score
Ranked #1 because of its Google rating and service focus: 5.0★ from 375 Google reviews, listed on Google as “Telecommunications service provider”.
Best Business Phone System Providers in Warren, MI (2026)
145 business phone system providers ranked by IFR ScoreUpdated 0 paid placements in this rankingHow we rank →
The short answer
- 1
Best overall in Warren: VOIP OFFICE LLC, IFR Score 68/100; 5.0★ from 375 Google reviews; open Saturdays until 12 AM.
- 11
Most-reviewed: Bell, 489 Google reviews at 4.9★, the most of 145 ranked; ranked #11.
Rankings can't be bought. IT providers can't pay to change their rank or score. How we rank
145 Warren business phone system providers are ranked here by IFR Score, from nine published factors. 75 open Saturdays and 64 open Sundays, based on posted hours. The median Google rating is 4.9★ across 145 rated IT firms.
Most of this list also appears on the Business phone system providers in Detroit ranking. See Business phone system providers in Detroit
Top 10 business phone system providers in Warren at a glance
Ranked by IFR Score from public data. Sponsored placements are labelled and never change the order.
| Rank | Business | IFR Score | Google rating | Based in | Hours | Best for |
|---|---|---|---|---|---|---|
| 1 | VOIP OFFICE LLC | 68 | 5.0★ (375) | Troy, 8 mi away | Sat · Evenings | Overall |
| 2 | XFER Communications Inc | 68 | 5.0★ (316) | Livonia, 19 mi away | Sat · Sun · Evenings | — |
| 3 | Total Wireless | 66 | 4.8★ (193) | Warren | Sat · Sun · Evenings | — |
| 4 | Boost Mobile | 66 | 4.9★ (271) | Southfield, 14 mi away | Sat · Sun · Evenings | — |
| 5 | Total Wireless | 65 | 4.9★ (158) | Madison Heights, 5 mi away | Sat · Sun · Evenings | — |
| 6 | 123NET | 65 | 4.5★ (218) | Southfield, 12 mi away | Sat · Sun · Evenings | — |
| 7 | Total Wireless | 65 | 4.9★ (175) | Clinton Township, 9 mi away | Sat · Sun · Evenings | — |
| 8 | Boost Mobile | 63 | 4.3★ (132) | Warren | Sat · Sun · Evenings | — |
| 9 | Boost Mobile | 63 | 4.9★ (109) | Dearborn Heights, 16 mi away | Sat · Sun · Evenings | — |
| 10 | Bell | 63 | 4.1★ (329) | Windsor, 15 mi away | Sat · Sun · Evenings | — |
The 145 best business phone system providers in Warren, ranked
Ordered by IFR Score, a 0–100 score from nine published factors. Paid placement never changes the order.
Ranked by IFR Score from public data. Sponsored placements are labelled and never change the order.
Scores below: based on 8 of 9 factors; recency not yet collected. Hatched segments mark factors we don't have yet.
Based in Livonia, 19 mi away
68/100IFR ScoreRanked #2 because of its Google rating and service focus: 5.0★ from 316 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Warren
66/100IFR ScoreRanked #3 because of its Google rating and service focus: 4.8★ from 193 Google reviews, listed on Google as “Telecommunications service provider”.
#4 Boost Mobile
Based in Southfield, 14 mi away
66/100IFR ScoreRanked #4 because of its Google rating and service focus: 4.9★ from 271 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Madison Heights, 5 mi away
65/100IFR ScoreRanked #5 because of its Google rating and service focus: 4.9★ from 158 Google reviews, listed on Google as “Telecommunications service provider”.
#6 123NET
Based in Southfield, 12 mi away
65/100IFR ScoreRanked #6 because of its Google rating and service focus: 4.5★ from 218 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Clinton Township, 9 mi away
65/100IFR ScoreRanked #7 because of its Google rating and service focus: 4.9★ from 175 Google reviews, listed on Google as “Telecommunications service provider”.
#8 Boost Mobile
Based in Warren
63/100IFR ScoreRanked #8 because of its Google rating and service focus: 4.3★ from 132 Google reviews, listed on Google as “Telecommunications service provider”.
#9 Boost Mobile
Based in Dearborn Heights, 16 mi away
63/100IFR ScoreRanked #9 because of its Google rating and service focus: 4.9★ from 109 Google reviews, listed on Google as “Telecommunications service provider”.
#10 Bell
Based in Windsor, 15 mi away
63/100IFR ScoreRanked #10 because of its Google rating and service focus: 4.1★ from 329 Google reviews, listed on Google as “Telecommunications service provider”.
#11 Bell
Based in Sarnia, 47 mi away
62/100IFR ScoreRanked #11 because of its Google rating and service focus: 4.9★ from 489 Google reviews, listed on Google as “Telecommunications service provider”.
#12 Total Wireless
Based in Pontiac, 19 mi away
62/100IFR ScoreRanked #12 because of its Google rating and service focus: 4.9★ from 93 Google reviews, listed on Google as “Telecommunications service provider”.
#13 Boost Mobile
Based in Southgate, 23 mi away
62/100IFR ScoreRanked #13 because of its Google rating and service focus: 4.6★ from 155 Google reviews, listed on Google as “Telecommunications service provider”.
#14 Total Wireless
Based in Pontiac, 15 mi away
62/100IFR ScoreRanked #14 because of its Google rating and service focus: 4.8★ from 70 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Warren
62/100IFR ScoreRanked #15 because of its Google rating and service focus: 4.9★ from 108 Google reviews, listed on Google as “Telecommunications service provider”.
#16 Total Wireless
Based in Warren
61/100IFR ScoreRanked #16 because of its Google rating and service focus: 5.0★ from 32 Google reviews, listed on Google as “Telecommunications service provider”.
#17 Boost Mobile
Based in Port Huron, 44 mi away
61/100IFR ScoreRanked #17 because of its Google rating and service focus: 4.5★ from 297 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Southfield, 14 mi away
61/100IFR ScoreRanked #18 because of its Google rating and service focus: 4.9★ from 31 Google reviews, listed on Google as “Telecommunications service provider”.
#19 Boost Mobile
Based in Dearborn Heights, 20 mi away
61/100IFR ScoreRanked #19 because of its Google rating and service focus: 4.4★ from 109 Google reviews, listed on Google as “Telecommunications service provider”.
#20 Total Wireless
Based in Detroit, 13 mi away
60/100IFR ScoreRanked #20 because of its Google rating and service focus: 4.7★ from 47 Google reviews, listed on Google as “Telecommunications service provider”.
#21 Total Wireless
Based in Clinton Township, 7 mi away
60/100IFR ScoreRanked #21 because of its Google rating and service focus: 5.0★ from 31 Google reviews, listed on Google as “Telecommunications service provider”.
#22 CallHarbor
Based in Livonia, 22 mi away
60/100IFR ScoreRanked #22 because of its Google rating and service focus: 5.0★ from 32 Google reviews, listed on Google as “Telecommunications service provider”.
#23 ManagedWay
Based in Troy, 6 mi away
60/100IFR ScoreRanked #23 because of its Google rating and service focus: 4.5★ from 24 Google reviews, listed on Google as “Telecommunications service provider”.
Based in Wyandotte, 21 mi away
60/100IFR ScoreRanked #24 because of its Google rating and service focus: 5.0★ from 47 Google reviews, listed on Google as “Telecommunications service provider”.
#25 Total Wireless
Based in Flint, 50 mi away
60/100IFR ScoreRanked #25 because of its Google rating and service focus: 5.0★ from 113 Google reviews, listed on Google as “Telecommunications service provider”.
How we ranked Warren business phone system providers
We scored 145 Warren business phone system providers on nine factors, weighted as shown. An IT firm is ranked when its service is confirmed and it has 3 or more Google reviews or a claimed profile. An IT firm with no Google reviews scores zero on rating, review volume and recency. Other unknown factors are left out, not counted as zero. Scores last refreshed November 9, 2026.
Paid placement never changes a rank or score. Sponsored businesses are paid, labelled, limited to 3 and shown above the ranking, outside it.
| Factor | Weight | Computed from | In Warren data |
|---|---|---|---|
| Reputation | 25% | Google star rating, adjusted for how many reviews back it | Measured |
| Review volume | 15% | Number of Google reviews, compared with the most-reviewed IT firm on the list | Measured |
| Recency | 10% | Share of reviews from the last 12 months | Not yet collected |
| Availability | 5% | Weekly open hours, Saturday, Sunday and 24/7 support | Measured |
| Service focus | 15% | How clearly the firm does this service (its Google category and name) | Measured |
| Proximity | 5% | Based in the city scores highest, less the farther away it is | Measured |
| Claimed profile | 10% | The firm has claimed its IT Firms Ranked profile (free or paid earn the same) | Measured |
| Partnered | 5% | The firm links to IT Firms Ranked from its own website with our badge, checked periodically | Measured |
| Client reviews | 10% | Verified client reviews collected by IT Firms Ranked: their rating and how many there are | Measured |
How to choose a business phone system provider
- Ask whether the system is cloud-hosted or installed on site, and who maintains it.
- Check internet capacity and backup: a cloud phone system stops when your connection does.
- Ask how 911 locations are registered for each phone and for remote staff.
- Compare per-user prices on the same features (call recording, queues, integrations).
- Ask for two or three references from clients of your size and industry, and call them.
- Get the scope, response times and price in writing before you sign, including how you leave and get your data back.
Questions to ask a business phone system provider
- Is the price per user, and which features are extra?
- Will you port our existing numbers, and how long does it take?
- What happens to calls if our internet connection goes down?
- How are 911 locations set up for office and remote staff?
- Who do we call for support, and during which hours?
- What is the contract length, and are phones bought or leased?
Terms explained
- MSP (managed service provider)
- A firm that runs a business’s IT for a recurring fee: monitoring, patching, help desk, backups and security tools.
- Co-managed IT
- An arrangement where an outside firm supports an in-house IT person or team, sharing tools and tasks.
- Break-fix
- IT support paid per incident or per hour, with no monthly agreement.
- SLA (service-level agreement)
- The contract terms for response and resolution times, uptime and support hours.
- Help desk
- The support line staff call or email for IT problems.
- RMM
- Remote monitoring and management software that lets an IT firm watch, patch and fix computers remotely.
- vCIO
- A virtual chief information officer: part-time IT strategy and budgeting from an outside firm.
- MSSP
- A managed security service provider: a firm that monitors and manages security tools around the clock.
- EDR / MDR
- Endpoint detection and response software, and the managed service of people watching its alerts (managed detection and response).
- MFA
- Multi-factor authentication: a second proof of identity, such as an app prompt, on top of a password.
- Penetration test
- An authorised, simulated attack on your systems to find weaknesses before criminals do.
- SOC 2
- An independent auditor’s report (AICPA standard) on a service provider’s security controls.
Business phone system providers in Warren: frequently asked questions
Who is the best business phone system provider in Warren?
By IFR Score, the highest-ranked business phone system provider in Warren, MI is VOIP OFFICE LLC with an IFR Score of 68/100. It has 5.0★ from 375 Google reviews. It is open Saturdays until 12 AM. XFER Communications Inc (#2) and Total Wireless (#3) follow. We ranked 145 business phone system providers on nine factors, last updated November 9, 2026.
How many business phone system providers are there in Warren?
ITFirmsRanked ranks 145 business phone system providers serving Warren, MI. 4 of them are based in Warren; the rest serve it from nearby towns. Counts are as of November 2026.
Which business phone system providers in Warren work on weekends?
75 of 145 ranked business phone system providers post Saturday hours and 64 post Sunday hours. The highest-ranked open Saturdays are VOIP OFFICE LLC (#1), XFER Communications Inc (#2) and Total Wireless (#3). Posted hours are office hours; many firms also run an after-hours support line for contract clients.
What Google rating do Warren business phone system providers have?
The median Google rating among 145 rated business phone system providers in Warren is 4.9★, with a median of 24 reviews. Bell has the most, 489 reviews, and ranks #11. We adjust ratings for review count, so a few five-star reviews cannot top the list.
How does ITFirmsRanked rank business phone system providers?
Each business phone system provider gets a 0–100 IFR Score from nine published factors, led by reputation (25%), review volume (15%), service focus (15%) and recency (10%). An IT firm with no Google reviews scores zero on rating, review volume and recency; other factors we cannot measure are left out. Only IT firms with a confirmed service and 3 or more reviews, or a claimed profile, are ranked.
Do business phone system providers outside Warren count in this ranking?
Yes, if they are within 50 mi of the Warren city center, our service radius for business phone system providers. Each listing shows where the IT firm is based and how far away it is. Proximity is 5% of the IFR Score, so a nearby IT firm gets a small edge.
Can business phone system providers pay to rank higher on ITFirmsRanked?
No. The IFR Score never reads payment status, and this ranking has 0 paid placements. Up to 3 Featured IT firms may appear above the list, labelled Sponsored and showing their honest rank.
What does a business phone system provider do?
Business phone system providers set up and support office phone systems, mostly cloud VoIP today: numbers, desk phones, call routing, voicemail and contact-centre features.
How are business phone system providers in Warren ranked?
By IFR Score: Google rating and review volume, recent reviews, opening hours, how clearly the firm does business phone systems and VoIP, distance, a claimed profile, our badge and verified client reviews. Sponsored placements never change the order.
Can we keep our phone numbers if we switch providers?
In most cases yes: numbers can be ported to a new provider in the US and Canada. Keep your current service active until the port is complete, and ask the new provider to manage the port request.
What about 911 calls on a VoIP system?
Each phone needs a registered location so 911 calls go to the right place. In the US, multi-line systems must support direct 911 dialling and send dispatchable location information under federal rules (Kari’s Law and RAY BAUM’S Act). Ask the provider how they set this up.
Update log for Warren
- November 2026: IFR Scores recalculated for 145 business phone system providers serving Warren.
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