I was with rogers paying around 170 for 4 line 6+3 gb shared plan.
Called videotron to see if their offer was true, the rep on the phone told me 200$-15x4= 140$ for 4 lines 6 gb each.
Called rogers to see if they could match, was told no and the new plans would cost me much more than the 170 I was paying.
Went to videotron and got new sims. All phones worked on videotron network (iphone6/8, moto x play and oneplus x)
ps: had to pay 15$ per line for activation fee and sim card.