A former cellphone store employee in Cutler Bay, Florida, is facing grand theft and organized fraud charges after deputies said he used customer trust to carry out a months-long theft and billing scheme.
Deputies with the Miami-Dade Sheriff’s Office identified him as Fernando Guevara-Olvera, 29, of Homestead, according to Local 10.
Investigators said Guevara-Olvera worked at Luna Wireless, a T-Mobile authorized retailer at 20519 Old Cutler Road in Cutler Bay.
Deputies said that trust became part of the alleged scheme, with customers later returning to the store over missing trade-in credits, billing changes, and unauthorized account activity.
The charges are allegations. Guevara-Olvera has not been convicted in the case.
Customers Believed He Was the Store’s Most Knowledgeable Representative
According to investigators, Guevara-Olvera was hired as a sales representative and quickly built a strong reputation among customers.
Some customers trusted him so much that they reportedly refused help from other employees because they believed he was the most knowledgeable sales representative at the location.
Deputies said he exploited that relationship over several months, turning routine upgrades and account service into transactions that later required review and correction by store management.
Trade-In Phones Were Allegedly Kept Instead of Processed
The trade-in part of the case involved customers who upgraded their cellphones and surrendered their old devices to the store.
Deputies said Guevara-Olvera kept those phones instead of properly processing them as trade-in devices. He then allegedly entered information into T-Mobile’s sales system to make it appear that the trade-ins had been completed.
Unauthorized Lines and Equipment Were Added to Accounts
Investigators said the alleged fraud extended beyond trade-in phones.
According to the arrest form cited by Local 10, Guevara-Olvera also activated unauthorized cellular lines on customer accounts, changed wireless plans without authorization, and added equipment including Apple iPhones, Apple Watches, and Apple EarPods.
When customers questioned billing problems, deputies said he blamed T-Mobile system errors.
He also allegedly used his personal bank account to make payments that temporarily made the billing issues appear resolved before the payments were returned or reversed two or three days later.
Losses Were Documented at Nearly $27,000
The alleged activity occurred between November and February, according to authorities. Guevara-Olvera resigned from Luna Wireless on Feb. 28, before the fraudulent activity had been discovered.
In the days and weeks that followed, customers began returning to the Old Cutler Road store in increasing numbers to report missing credits and billing problems.
Management told investigators that nearly every transaction processed by Guevara-Olvera required manual review and corrective action.
Luna Wireless documented $15,020.72 in customer courtesy-credit losses and $11,769.00 in inventory losses. Authorities said the total documented financial loss attributed to Guevara-Olvera’s alleged conduct was $26,789.72.
Deputies Took Him Into Custody Tuesday
Members of the Miami-Dade Sheriff’s Office Organized Crime Bureau located Guevara-Olvera on Tuesday and took him into custody without incident.
According to the arrest form, Guevara-Olvera spoke with detectives and admitted to some of the crimes, but also said he believed his former manager was blaming him for things he was not responsible for.
Deputies said the business had provided specific details itemized by customer, transaction date, and affected account.
As of Wednesday afternoon, Local 10 reported that Guevara-Olvera was being held at Turner Guilford Knight Correctional Center on grand theft and organized fraud charges, with bond listed as “to be set.”
Customers Should Check More Than the Trade-In Receipt
Customers who upgrade phones can check the carrier account after the transaction to confirm the trade-in device was received, the credit was applied, the wireless plan was not changed without permission, and no extra phones, watches, earbuds, tablets, protection plans, or lines were added.
Useful records include trade-in receipts, device serial numbers or IMEI numbers, account-change emails, text confirmations, billing statements, screenshots from the carrier app, payment records, and the name of the store employee who handled the transaction.
Anyone who finds unauthorized cellular lines, equipment, plan changes, or missing trade-in credits should contact the carrier directly through the official app, website, or customer service number. Suspected fraud can also be reported to the retailer, the carrier’s fraud department, local law enforcement, and the FTC at ReportFraud.ftc.gov.