Re: Piranha's Call-Off-Load feature. What format is used for the too and from phone numbers? Canonical international? With or without dialing codes? Has anyone used this feature?

I would use 0039xxxx

So, *110*0012345551212*00442034614444#<SEND>
would connect a call from a hypothetical number in the US to the Bank of England's switchboard in UK?

Yes, that should work.

Does the Piranha Mobile SIM work in an iPhone 3GS?

I have an old, unlocked iPhone 3GS. I've tested it with a T-Mobile SIM and it works fine. When I insert the Piranha SIM, it starts off with "Searching" and ends up on "No Service." Putting the phone in and out of Airplane Mode produces "Invalid SIM".

The SIM works perfectly in my Moto G.

I do not see why not, since you said it's unlocked. Mine works in my unlocked AT&T Iphone 4.

It appears that it has to do with the default crippled mode of AT&T phones. When I insert my T-Mobile PAYG SIM, after a few minutes it updates the settings and give me the manual carrier selection menu and T-Mobile STK. With the Piranha SIM it does not do this. The phone has iOS 6.1.6, which is up-to-date for this phone. I'm also getting advice from Piranha Mobile but so far, no joy.

I wanted to use the old iPhone 3G because it has all the needed bands and is expendable.

Today I had to remove from my dual sim phone my Piranha cause even if it seemed that everything was ok (good signal on the phone) the sim was not registered on network and if called said "sim out of coverage" .
I am very disappointed, all problems I had with the initial setup seemed solved but as of today that's not the case.
Anyone else with the same issue?

have you tried another handset, i had issues with my dual SIM handset, SIM was fine when i changed back to the single SIM handset. What make and model are you using??

Thanks for replying. I am using a Oneplus 3T, that's strange because this sim after a bit of problems at the beginning when registering, was working ok. Anyway there's always a big delay in registering on the network. I contacted the customer care and they said it could be Tim (the Italian carrier) could have experienced some issues.

Other networks in Italy a possibility?
 

I just looked up the rates for Italy
and they show three different networks used.
HG3, Wind and TIM.
Are the other networks a possibility for your needs?

I tried and retried all day long. Let me describe the problem in details.
The piranha sim I used, apart from some issue at the beginning when I noticed a certain difficulty registering on mobile networks (already described in this and many other forums) was working pretty ok.
Yesterday evening I rebooted my oneplus 3T (a top notch headset, dual sim, LTE) and discovered that the sim was not receiving any calls. In fact it showed full signal but if I tried to call myself from another phone, the voice said "the number you have dialled is out of coverage". No sms, no outgoing calls too.
I have been in contact all the afternoon with the customer care and even if at a certain point I received one test call from them and was also able to call an Italian landline, in at least other ten calls I could not make the call start.
So I decided to change operator, but to no avail since problems persisted.
I know you are wondering if it's my headset's fault but it isn't. All this morning I used in the second slot another sim card (an Italian sim card) and it worked. I also inserted an Estonian sim and it is actually working.
Customer care suggested me to repeat operations after putting the Piranha in the simcard slot 1 and I did so. Even in this case it is not working.
What I liked most of this simcard where the prices and the US number, since it can be reached at a lower price than Estonians but on the other side I don't want to ruin my beautiful and perfectly working ONEplus 3T phone putting and taking out this sim card trying all day to make things work.
I have reached an agreement with the customer care. Tomorrow morning I'm gonna send the sim back so they can check it. I told them that instead of a full refund I would prefer a working simcard with the same number. I'll specify this in an attached letter and hope they will try to help.
Thanks anyway for your post.

I can't help but believe that some of the reported issues have to do with Piranha's multi-IMSI SIM technology. I suspect that if I took my iPhone 3GS with the Piranha SIM out of the US, where it latches onto AT&T, it would probably start working.

Well, I really don't know what happened but I suspect that the sim was someway faulty due to this strange behaviour. No other hassle with other simcards so the handset is working perfectly. Let's see if they will find what's wrong, I shipped today the sim to UK via registered mail.

VOIP? Has anyone ever "played around with" Piranha's VoIP? You could call a TelnaMobile phone by its SIP address. You could also use Telna's SIP server to make free calls to other SIP addresses. I'm wondering if anything like this is possible with Piranha?

Update: I've tried calling [US_number]@piranhavoip.net and [VoIP_ID]@piranhavoip.net. Neither connected. They both gave Not_Found errors.

I just tested Call-Off-Load in a US to US call.
 

I just tested Call-Off-Load in a US to US call.
Truphone to Truphone---incoming calls free.

I used the STK [SIM Tool Kit] in the phone. NO "+".
[Just tested it again. Did not work with "+".]
Just 1xxxyyyzzzz for both phones.
I think this way [if it works for you] is easier to set up.
1. Put in number you want to receive call at, press OK.
2. Put in number you want to send call to, press OK. Call is set up.

STK call option "Landline callback"

I can't remember this option (landline Callback) in my Piranha sim toolkit. At the moment my sim is going back to Uk for a check, but I remember this option was not present.

Just a question to all forum's members:
do you use the Piranha in a single or dual sim? Mine worked flawlessly (more or less) for a month, then when called, said "out of reach". It has always been used in my dual sim and the customer care says that this malfunction could be due to the dual sim. So my question is: why did it work and then not?

I have used mine in both dual band single SIM phone. Customer service agent is wrong here. It has nothing to do with dual or single SIM. Must be another issue.

Thanks. I hope they will find that the sim is defective so they will ship another.

Well, for the record, here are the items in mine. [Recieved SIM in December 2012.]
My services-----every thing by clicking this.
Place call
Landline callback
Call forwarding
Check balance
Recharge
My numbers
Advanced settings
under A S is Set subscription
Trigger mode

I got none of them, just get connection and other
two. Unless they modified the sim toolkit..

I don't have my Piranha SIM right now but my STK is highly abbreviated compared to yours. As I recall, it has Trigger Mode, Forward and Balance. I remarked on how the landline callback was much more difficult than my Telna SIM, that had it in the STK. I received it just this month.

Yes, when I told them they said that this depends on sim version. Mine was the v 8 and had just three options.

Update
 

I can also just use xxxyyyzzzz
to initiate the callback.
No "1" necessary.

Further testing.
 

I just tested this today.

*110*callbackDestinationNumber*callDestinationNumb er#Send

I saved both xxxyyyzzzz and 1xxxyyyzzzz formats in my address book and they both worked.

HOWEVER, I could not save format +1xxxyyyzzzz in my address book or
just stick it in and send it. The phone said "invalid format" for both attempts.

FWIW, Paranha seems to charge 3 US cents a minute for these calls.
That is, six cents for less than two minutes.

Did piranha remove their VoIP app for Android from the store? No luck finding it. .

yep they use Zoiper now, its very good, but when you install you have to use Piranha UK as provider and all settings are auto installed, you only need U/N and P/W.

I use CSIPsimple. All I had to enter was the user name, server and password and it worked.

I don't know if Piranha's server implements the G.729 VoIP CODEC or not. For all the SIP clients I know of, they charge about US$10 extra for the basic CODEC without any annexes.

I tested the system with my THL W100 (a Chinese dual sim phone) and when connected via wifi, calls came throught the sip instead of the gsm. That's exactly the system's expected behaviour. On the other hand, in my top notch Oneplus 3T the native sip client doesn't work for incoming calls, so they come via gsm.
The system offered by Piranha is a good one and I really hope they will be able to understand what's wrong with my sim.

Thanks gkeeper and DrNewcomb.