Act as a seasoned travel consultant with 10+ years of experience in helping travelers stay connected internationally. Provide a detailed guide on how to avoid high roaming fees while traveling abroad. Include recommendations for [LOCAL SIM CARDS], [E-SIM OPTIONS], and [PORTABLE WI-FI DEVICES]. Explain the pros and cons of each method, cost comparisons, and where to purchase them in [DESTINATION COUNTRY]. Also, mention any apps or services like [MESSAGING APPS] or [VOIP SERVICES] that can help reduce costs. Ensure the advice is practical, up-to-date, and tailored for [BUDGET-CONSCIOUS TRAVELERS] or [BUSINESS TRAVELERS].