I have had great experience with the service, including help lines, and I have been very happy with the reasonable call charges.
Only problem was unwanted data using my credit. However that was easily fixed, on Travel SIM’s advice, by my changing my travel phone settings to turn off the data usage.
Travel SIM now issue Australian rather than Estonian phone numbers too.

Have only been able to make a couple of phone calls and then I went into negative balance. Loaded the min $25 credit (for calls) and $25 for data the had no access at all. Tried getting help on the 24/7 line and via email - no response! This is a terrible rip off, and a let down when most needed. Do not buy!

This was not good value for money. Frequent recording” experiencing heavy traffic, call back later” when not convenient to do so.?not enough bandwidth?
Couldn’t send emails to Australia(home carrier is Telstra)but no advice/ warning about how to solve this issue. Need to keep recharging account every 6 months or lose it,especially when no plans to go overseas for longer interval. Could not recommend this product.

This service should be stopped. I could not get service for data, or text messages or internet or phone calls in Ecuador, Chile and Peru. It was dangerous because I could not use maps in these dangerous countries. My business suffered also because of the lack of service - they just keep asking for more money. It might sound cheap but you get what you pay for. DO NOT USE IT.

in fours weeks the 3 sim cards i purchased were very useless 8 times our service went down with no internet no calls & no text for several days at a time, was always told its fixed but broke down again straight away, i have lodged complaint and request for full refund, the flexisim is a piece of junk you will be sadly dissappointed.

I put the SIM in the phone in Australia, all working OK. Could not use at the airport in China neither could I use either phone or data in UK where I spent most of my time. Wasted an awful lot of money on SIM and data pack. Ended up buying a cheap phone in UK and PAYG

I find it ok. Some times no service but you get service as promised. I purchased data pack. Speed was bit slow though, but what more you want. No complains.

Terrible product:
* No voicemail
* Ridiculous overpriced rates both in Australia and overseas for both incoming and outgoing calls
* Randomly directed me to update the SIM card after a few months - very disorganized on their part
* When I was overseas (in New Zealand!) they sent a message that I should respond with my return date or implying they would discontinue the service if not - it is supposed to be a 'TRAVEL' SIM. The icing on the cake was that I couldn't respond to the message as MMS was not activated on the service.
Repeat: Terrible product - Useless for travellers - Do not buy

I’m another angry Auspost SIM customer. It was an absolute nightmare to use in any and every Zone 1 and 2 country I travelled to.
I researched this SIM’s benefits and selected it for its promise of seamless call access through both zones, but no!!! it took an average of 3 days to sync in every city we visited. Useless!!!!! We were flying in and out of countries every 3-4 days.
It still managed to chew up $80 worth of (call and data) credit, despite not being able to make a single phone call!!! And it is astonishing that there is no way to view a call log to review where money has been spent.
Clearly, this SIM needs to be deleted from the market place. I am only one of many, many similar complaints. See more below..

Bought 4 SIM cards - only two ported within 4 days, 1 while we were already overseas, and one never ported (it has been over 2 weeks). Calls and data lose signal constantly in US.

Great, worked kathmandu nepal @ top of hill @ kopan, dropped out too & came back though, but pleased worked at all, only used half gig over weeks there as did $25 data pack & used $5cr for texts.
Using messenger & WhatsApp for calls if add country code & state code without the zero eg 07 qld add +61 aus then 7 then business number worked via WhatsApp for free to call travel agent, so surprised it worked & so was he.
Texting worked fine too, but if add their country code.
Ps need data roaming on, I'm guessing location, data & maybe wifi just incase & I didn't use power saver as I'd heard affects signal.
Thanks aus post people :) I'm happy

Sometimes it worked other times it didn't. Had to constantly reboot phone and login screen would freeze all the time. Not a phone problem because everything else worked fine. Would not recommend and also very expensive.

brought travelsim from aust post counter was advised to purchase more credit which i did and was advise to activate sim before i left Australia it took 1 hr to activate set up account redeem voucher 2hrs after activation recieved a sms saying all credit was used up i went to site chatted with Miria who advised that data usage was all used up i just wasted $45 and didnt even use phone check of data used on ph was app for travelsim 584 mb @ 15cent mb =$8.76 not $33.63 operator said i need to purchase more credit otherwise account is suspended noway its a easy way of making money

Easy to set up with free app & can choose new phone number or keep existing number. Login is too much - enter password then have to enter email & another password on 2nd screen. Doesn't show updated balance for a few days. Call & data rates competitive

Bought the Australia Post travel sim for $25 plus a $25 recharge. Tried and tried but could not get it to work, total waste of $50. Bought a Vodafone sim locally with 1.5g Data and 200 mins for just NZ$29 and it worked instantly. Save your money and buy on arrival.