Yagi is great NJ, so long as you know where the towers are, lol. Geez that's an oldish phone, must be at least 10 years old lol.
Been playing with the new Tough Max 3 since I got home.
First things first, I tried my Boost Mobile SIM in it at the Telstra shop after I'd paid for it and it worked seemlessly just as I expected it would. 
So no need to pay an unlock fee.
I told the sales rep I used a 12 month expiry SIM @ $150 for 80GB. He then said to me, "Well we do a 12 mth SIM @ $300 for 180GB of Data." So I replied, "Well if I spent $300 with Boost, I get 240GB of Data, which is 33 1/3 more for the same price, what would you do?" lol. Calls n txts are unlimited either way as well.
He also said "well it may not work on the whole network." I educated him in saying it did work on the whole network. He also did not know that Telstra owned a % of Boost.
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"Currently, Boost is the only MVNO to make full use of the Telstra network others only use parts of it.1 Feb 2021" Copied from Canstar Blue's Web site and fairly current.
Again for those that hate acronyms, lol MVNO = Mobile Virtual Network Operator, they are retailers that buy network space from the 3 networks (Telstra, Optus and Vodaphone). Others such as Lyca, Belong, Aldi, Woolworths etc there are a lot more, don't use the entire network according to them.
