Tello Mobile
Tello Mobile is a no-contract MVNO (Mobile Virtual Network Operator) using T-Mobile's 5G/LTE network. It offers customizable prepaid plans starting at $5/month with options from no data to unlimited (50GB premium), emphasizing simplicity, transparency, and low prices. Founded in 2016 and owned by KeepCalling (Atlanta, GA), it serves budget-conscious consumers in urban and suburban areas.
Score generated by AI agents based on publicly cited evidence and reviewed by the project maintainer. Not independently validated.
Score History
Timeline events are AI-curated from public reporting. Score trajectory is derived from documented events.
Tello launched in May 2016 on Sprint's CDMA network as a budget MVNO by KeepCalling, offering fully customizable plans starting at $5/month with no contracts. The service was bare-bones — no unlimited text inclusion, limited device compatibility — but the pricing was aggressively low for the US market. KeepCalling's 14 years of international telecom experience provided operational maturity despite Tello being a new brand.
Tello executed three consecutive price drops between October 2017 and March 2018, reducing plan costs by up to 35%. All plans gained unlimited text at no extra charge, and a referral program launched in May 2018 offering $10 Tello Dollars per referral. The subscriber base grew past 50,000 active users. However, the autopay/rollover asymmetry emerged as a mild anti-user design choice — customers using the more convenient autopay forfeited unused data, while manual payers retained it.
The April 2020 Sprint/T-Mobile merger created existential uncertainty for Sprint MVNOs like Tello. The company launched a $39/month unlimited plan in August 2019 and reached 100,000 active subscribers by May 2020, but the network transition loomed. Balance forfeiture policies on port-out and the undisclosed 10-day provisional period for new number port-outs introduced minor switching friction. Tello committed to maintaining plan pricing through the transition.
Tello completed its network migration to T-Mobile's GSM infrastructure by mid-2021, gaining 5G access, Wi-Fi calling, and full iPhone support including MMS and Visual Voicemail. In October 2022, eSIM support launched. A permanent price drop in May 2022 cut the unlimited plan from $39 to $29 and boosted data allotments. However, BBB complaints accumulated around eSIM activation issues and opaque account suspensions tied to automated security checks, slightly increasing regulatory friction.
Tello continued its pattern of pro-consumer pricing, with three consecutive years of data increases and price drops. The service added eSIM support, international roaming, and upgraded its unlimited plan to 50GB. Minor regulatory friction accumulated through BBB complaints about port-out timing and eSIM issues, but no enforcement actions materialized. KeepCalling rebranded entirely under the Tello name, reflecting the MVNO's success as the company's flagship product.
Alternatives
Independent MVNO offering plans on both T-Mobile and Verizon networks with strong customization options. Similar pricing to Tello with the added flexibility of choosing your underlying network. Offers family plan discounts that Tello lacks. Easy switch.
T-Mobile MVNO (now T-Mobile-owned) with plans starting at $15/month for 5GB. Requires prepaying 3-12 months upfront for the best prices, unlike Tello's monthly billing. Larger brand with more marketing spend but less plan customization. Easy switch — same T-Mobile network.
Dimensional Breakdown
Summaries below were written by AI agents based on the cited evidence. They are editorial interpretations, not independent research findings.
Dimension History
Timeline (30 events)
KeepCalling Founded With $100 Investment in Georgia
Romanian immigrant Florin Miron launched SunaRomania.com from Americus, Georgia with a $100 initial investment, reselling phone card PINs to Romanian expatriates. This became the foundation of KeepCalling, the parent company that would later create Tello Mobile.
KeepCalling Revenue Reaches $1 Million Milestone
Three years after founding, KeepCalling hit $1 million in annual sales, validating the ethnic telecom niche. The company had expanded to offices in Sibiu, Romania (2003) and Cochabamba, Bolivia (2004), establishing the multinational workforce structure that continues today.
KeepCalling Debuts on Inc 5000 Fastest-Growing List
KeepCalling was ranked No. 849 on the Inc. 5000 list of fastest-growing private companies, reflecting 335% revenue growth from 2008-2011. The company would maintain this ranking for four consecutive years through 2014, growing from $6.7 million to $41 million in revenue.
Tello Mobile Launches on Sprint Network
KeepCalling launched Tello Mobile as a Sprint MVNO offering fully customizable prepaid plans starting at $5/month with no contracts. Customers could mix and match minutes, texts, and data amounts using an online dashboard. The service accepted CDMA-compatible unlocked devices and sold phones starting at $56.
Tello Cuts Prices and Adds Unlimited Texts for All
Tello restructured its plan pricing, adding unlimited texts to all plans at no extra charge regardless of the minutes/data combo selected. Previously, text messaging cost $2 for 200 texts or $3 for unlimited. A 5GB + 5GB free data bonus was also introduced for heavier data users.
Second Price Drop Reduces Plans by Up to $6
Tello executed a second price reduction within two months, cutting plans above $17 by up to $6. A plan with 500 minutes and 3GB dropped from $34 to $28 per month. Existing customers had their accounts automatically updated to the lower prices.
Major Price Drop Cuts Plans by Up to 35%
Tello announced its largest price reduction to date, with most plans dropping up to 35%. An unlimited minutes/text + 1GB plan fell from $19 to $14/month; unlimited + 2GB dropped from $25 to $19/month. Plans ranged from $5 to $39/month. Free tethering and calls to Canada, Mexico, and China were included.
Tello Launches Referral Program With $10 Credits
Tello introduced a referral program offering $10 in Tello Dollars to both the referrer and the referred customer. Over 3,000 customers participated in the first year, generating more than $19,000 in account credits. Tello Dollars can be used to pay for plans or purchase phones.
Tello Reaches 50,000 Active Subscribers
Tello announced surpassing 50,000 monthly active subscribers, a notable milestone for a small independent MVNO. Most MVNOs do not disclose subscriber counts and are believed to have fewer than 100,000 users, making Tello's transparency and growth rate unusual for the segment.
Plans Reduced by Up to 28% With October Rollout
Tello announced price cuts of up to 28% effective October 19, 2019. An unlimited minutes/text + 2GB plan dropped from $39 to $29. Unlimited text remained standard across all plans, and the 5GB + 5GB free data bonus continued for heavier users.
Tello Launches First Unlimited Plan at $39/Month
Tello introduced its first unlimited plan offering unlimited talk, text, and data for $39/month. The plan included 25GB of high-speed 4G LTE data before throttling to 2G speeds, free mobile hotspot tethering, and calls to Canada, Mexico, and China. This was marketed as a limited-time offer.
Sprint/T-Mobile Merger Completed, MVNO Future Uncertain
T-Mobile completed its $26 billion acquisition of Sprint, creating uncertainty for Sprint MVNOs like Tello that depended on Sprint's wholesale network access. Analysts noted that no provisions existed to protect most MVNOs beyond Dish and Altice, raising concerns about potential price increases or dropped agreements.
Tello Reaches 100,000 Active Subscribers
Tello crossed the 100,000 active subscriber milestone, coinciding with its 4th anniversary. To celebrate, the company offered new customers a $15 account credit. Reaching six figures placed Tello among the larger independent MVNOs in a market where most never reach that threshold.
Tello Goes Live on T-Mobile GSM Network
Tello began enrolling all new customers on T-Mobile's GSM network, marking the completion of its transition away from Sprint's CDMA infrastructure. Existing CDMA customers received free replacement SIM cards and were migrated in batches through mid-2021. Plan pricing remained unchanged throughout the transition.
5G Access Included at No Extra Cost on All Plans
Tello announced 5G availability on all plans at no additional charge, coinciding with the GSM network transition. Initially only 5G-capable Android phones were supported; iOS 5G support came later. The company also offered 50% off plans for three months as a promotional incentive for the network switch.
Free International Calls to 60+ Countries Added to All Plans
Tello expanded its international calling feature from four countries (Canada, Mexico, China, Romania) to over 60 destinations at no extra charge. Minutes used for international calls are deducted from the regular plan balance. This leveraged KeepCalling's core competency in international telecommunications.
Full iPhone Support Added After GSM Migration
Tello resolved iOS compatibility issues that emerged during the Sprint-to-T-Mobile GSM transition, gaining full support for Group MMS, Visual Voicemail, Wi-Fi Calling, and VoLTE on iPhones. Affected customers received free replacement SIM cards.
Permanent Price Drop Cuts Unlimited Plan From $39 to $29
Tello permanently reduced prices across its plan lineup. The unlimited plan dropped from $39 to $29/month, the 5GB plan fell to $19 (previously $24 for 4GB), and the 10GB plan dropped to $24. All plans now included unlimited minutes. This was positioned as a permanent restructuring, not a promotional offer.
eSIM Support Launched for Instant Activation
Tello added eSIM activation to its platform, enabling customers to activate service instantly via QR code scan without waiting for a physical SIM card. The feature supported newer Apple and Google devices and unlocked smartwatches, allowing dual-SIM usage with two phone lines on one device.
Major Price Drop: Unlimited Plan Drops to $25 With 35GB
Tello restructured pricing again, dropping the unlimited plan from $29 to $25/month while increasing high-speed data from 25GB to 35GB. A new 15GB tier was added at $24/month. The 500MB plan was replaced by 1GB at the same price. Crucially, Tello eliminated throttled 2G data after cap on non-unlimited plans — service simply stops when data runs out.
Data Add-On Feature and SMS Purchases Launched
Tello introduced a Data Add-On feature allowing customers to purchase additional data at $5/1GB, $10/3GB, or $15/5GB. Simultaneously, SMS Purchases launched, enabling plan renewals and data top-ups via text message (e.g., texting 'ADD1GB' to 800). This provided a secondary revenue stream beyond base plan subscriptions.
Throttled 2G Data Eliminated on Limited Plans
Tello changed its policy for non-unlimited plans: instead of throttling to 2G speeds after data cap, service simply stops until the customer adds more data or the billing cycle renews. While this removes the frustration of unusable 2G speeds, it also eliminates the safety net of having any connectivity after cap.
Apple Pay, Google Pay, and Venmo Added as Payment Options
Tello expanded its payment methods to include Apple Pay, Google Pay, and Venmo alongside traditional credit/debit card payments. This reduced friction for customers managing their wireless plans and aligned with broader mobile payment adoption trends.
International Roaming Launched in 250+ Countries
Tello introduced International Roaming, allowing customers to use calls, texts, and data abroad in over 250 countries. Roaming charges are deducted from Pay As You Go balance at $0.05/MB for data, with a minimum $5 PAYG balance required to activate. Auto Recharge is disabled during roaming to prevent unexpected charges.
Two-Factor Authentication and Scam Guard Launched
Tello introduced two-factor authentication (2FA) using authenticator apps, a long-requested security feature. Simultaneously, Scam Guard launched as a $2/month add-on offering call screening with 'Scam Likely' flagging or automatic blocking of suspicious calls, updating its database every six minutes.
RCS Messaging Support Enabled for iPhones
With iOS 18.4, Tello became one of the first T-Mobile MVNOs to support RCS messaging on iPhones, enabling richer cross-platform communication including higher-resolution media sharing, read receipts, and improved group messaging between iPhone and Android users.
KeepCalling Rebrands Entirely Under Tello Name
KeepCalling, the parent company operating since 2002, rebranded all operations under the Tello name, acknowledging Tello Mobile as its most successful product. The company stated it would 'continue the journey under a unified identity' while maintaining existing services and customer commitments across its telecom portfolio.
Unlimited Plan Upgraded to 50GB With 10GB Hotspot
Tello increased the $25/month unlimited plan's high-speed data from 35GB to 50GB — a 43% increase — while keeping the price unchanged. The hotspot allotment doubled from 5GB to 10GB. Existing customers received the upgrade automatically at no extra cost, maintaining Tello's pattern of improving value without raising prices.
Data Rollover Introduced for Unlimited Plan
Tello launched Data Rollover for unlimited plan subscribers, allowing up to 50GB of unused high-speed data to carry over monthly with a maximum accumulation of 100GB. Eligibility required 12 months of Tello service and 6 consecutive billing cycles on an unlimited plan, creating a loyalty incentive that also introduces mild switching costs.
Plan Lineup Simplified, Budget Tiers Eliminated
Tello restructured from fully customizable plans to four bundles: $5 (300 min), $8 (2GB + 300 min), $15 (10GB unlimited talk/text), and $20 (20GB). The 1GB, 5GB, and 15GB data tiers were eliminated. While moderate/heavy users benefited, low-usage customers saw 20-33% price increases. Manual renewal was discontinued, ending the popular data rollover workaround for non-unlimited plans.
Evidence (35 citations)
D1: User Value Erosion
D2: Business Customer Exploitation
D3: Shareholder Extraction
D4: Lock-in & Switching Costs
D5: Twiddling & Algorithmic Opacity
D6: Dark Patterns
D7: Advertising & Monetization Pressure
D8: Competitive Conduct
D9: Labor & Governance
D10: Regulatory & Legal Posture
Scoring Log (4 entries)
Stripped for Phase 2 re-enrichment
Fixed US Mobile: url->slug cross-reference (us-mobile exists in slug-lookup)