Compare phone or insurance plans side by side

I'm comparing phone plans and I want to know which one is actually cheaper for me.

The plans:

Plan A: $45/month for 12 months, then $60/month. 30GB data, then slowed. 24-month contract. $35 activation fee.

Plan B: $55/month, no contract. Unlimited data, slowed after 50GB in busy areas. Includes calls to Canada and Mexico. Autopay discount of $5 already included in the price.

How I use it: I use about 20GB a month, more when I travel. I call my sister in Mexico most weeks. I'd switch again in two years if something cheaper came along.

Do this:
1. Work out the total cost of each plan over the time I'm likely to keep it, including every one-off fee and any price change after an introductory period. Show the working as a table so I can check the sums.
2. Put the plans side by side on the things that matter for how I use it. Skip features I've said I don't need.
3. List every condition in the small print that could cost me more than the headline price: price rises, fees for leaving early, limits, discounts that depend on something.
4. Tell me what information is missing from what I pasted that I'd need before deciding, and the exact question to ask each provider.

Then say which plan looks better for me and why, in two or three sentences. If it's close, or if it depends on something I haven't told you, say that instead of picking one.

Only use the numbers I've pasted. If something isn't stated, say it isn't stated rather than assuming.

What you get: What each plan really costs over the contract, and the questions still to ask before you sign.