Be sure to read the BBB report on this company (https://www.bbb.org/us/wa/bellevue/profile/tablet-equipment/cellunlockernet-1296-22717217). I wish I had before I sent them my money. I sent them my IMEI code and they took my money (more than the receipt showed they would). They provided unlock codes for my phone which proved to be bogus. I have not heard from them since. The service they allege to furnish is available to you for free.
First determine the IMEI number for the phone. On an iPhone Settings>General>About and scroll down to you see it. Dialing *#06# on the phone will also frequently give you the number.
Next determine the carrier. If you know the carrier, good, otherwise, look at the SIM card and it will tell you the carry. If the SIM card is gone, call the manufacturer and they will tell you who the phone was delivered to.
Next call the carrier and request the 16-digit unlock code. You will need to give them your IMEI number. They should give it to you. If they do not, file a complaint with the CCTS. https://www.ccts-cprst.ca/. It took a couple of weeks, but they compelled my old carrier to provide the number when they originally failed to do so.
Pros and Cons:
Bottom Line: No, I would not recommend this to a friend
Company Response from Cellunlocker.net
Hi Bill,
That's terrible to hear but these are some serious accusations against our company, Cellunlocker.net.
We will do my best address all your claims:
1) We don't charge more than what you see at checkout.
2) We don't sell free services, all our services are paid to sources. Our customers come to us when their network providers don't unlock their phones.
3) We answer our emails within a business day, please so kind as to provide us with your details to investigate.
4) You had hugely contradicted yourself referring to an iPhone and later saying to get the "16 digit unlock code". iPhones do NOT use unlock codes to unlock, they are unlocked remotely through Apple servers.
5) In general, carriers do NOT unlock phones unless you fulfill their strict requirements ie. Existing contract/fully paying the balance of the phone/owner of the account/not bad ESN/blacklist etc...
The post you have described does not add up, we will have to investigate this.
Support Cellunlocker.net